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His Obsession: An Age Gap, Mafia Romance

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I went to my brother's house expecting dinner.
Instead, his best friend looked at me like he wanted to ruin me.


Sebastian De Luca.
My brother's oldest friend.
Dark eyes. Controlled. And not the kind of man you say no to.

I should have kept my distance.
Instead, I let him pull me onto the dance floor of his nightclub.
Then into his bed, before I could remember why men like him are dangerous.

One night was supposed to get him out of my system.
Instead, two pink lines changed everything.

Then my violent ex found me.
And suddenly, nowhere felt safe anymore.

Sebastian moved me into his mansion that night.
Guards at every door. Eyes on every camera.
He didn't ask. He decided.

Now it's not just protection. It's possession.
And God help the man stupid enough to come for what's his.



This is a full-length, standalone age-gap mafia romance packed with danger, possessive heat, and a guaranteed HEA. No cliffhanger.

296 pages, Kindle Edition

Published June 15, 2026

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Natasha L. Black

107 books547 followers

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Displaying 1 - 30 of 66 reviews
Profile Image for Tracy Kemp.
139 reviews6 followers
Review of advance copy received from Author
June 13, 2026
There was something irresistible about the dynamic between Sebastian and Valentina from the very beginning. She is his best friend’s little sister, fiercely independent, stubborn, and determined to build her own success in the competitive LA event-planning scene. Val has spent years creating a life defined by competence, control, and carefully guarded walls. After surviving an abusive relationship that left scars far deeper than anyone realizes, she refuses to let another man dictate her life. Every locked door and every carefully planned detail is her way of keeping herself safe.
Sebastian, meanwhile, is a man who is used to getting exactly what he wants. Powerful, possessive, and morally gray, he thrives on control and protection. When he offers Val the prestigious annual gala contract and even doubles her fee, she knows she should keep her distance. She also knows he'll probably be the client from hell. Yet working together only intensifies the chemistry that neither of them can ignore. Despite warnings from Val's brother, Nico, and all the reasons they know they should stay away from each other, one reckless night changes everything.
What Val intends to be a one-night stand becomes much more complicated when she discovers she's pregnant. But her growing feelings for Sebastian are overshadowed by an even greater threat. Someone from her past is watching her, and the fear she thought she had escaped comes rushing back. Convinced he can protect her, Sebastian brings her into his heavily guarded world of gates, cameras, security, and rules. But for Val, safety and confinement are dangerously similar. Having survived a man who disguised control as love, she refuses to exchange one cage for another, no matter how much she desires Sebastian.
What made this story stand out for me wasn't just the intense chemistry or the high-stakes danger. It was the emotional growth. Sebastian's devotion is fierce, obsessive, and deeply possessive, but the real beauty lies in watching him realize that love isn't ownership. Loving Val means giving her choices. It means respecting her autonomy, even when every protective instinct in him is screaming otherwise. His journey from wanting to possess her to learning restraint and unconditional support was incredibly satisfying.
Valentina was such a strong heroine. Her strength comes from survival, but her growth comes from allowing herself to be seen without surrendering who she is. Watching her slowly learn to trust again, while still holding onto her independence, made her journey deeply emotional. She never loses herself in the relationship, and that made their love story feel earned.
The forced proximity, brother's best friend tension, surprise pregnancy, and looming danger create plenty of drama, but at its heart this is a story about healing and trust. The romance is dark, steamy, and packed with obsession and vulnerability, but it never loses sight of the emotional stakes. Sebastian and Val don't simply fall in love; they fight through trauma, fear, and their own flaws to build something stronger.
This was more than just a mafia romance. It was a story about a woman rebuilding her life after violence, a man learning that protection without choice is simply another prison, and two people discovering that true devotion isn't about possession—it's about trust, respect, and giving each other the freedom to choose love every single day. Passionate, emotional, and wonderfully addictive, this book delivered all the angst, heat, and heart I could have hoped for.
Profile Image for Jenna Lundberg.
160 reviews1 follower
June 16, 2026
🖤 He Wanted to Possess Her, But Loving Her Meant Letting Go 🖤
⭐⭐⭐⭐⭐ 5 Stars
🌶️🌶️🌶️ Spice

His Obsession delivered everything I wanted from a mafia romance and then surprised me by delivering so much more.

At first glance, this has all the ingredients dark romance readers love: a powerful and possessive mafia hero, a fiercely independent heroine, brother's best friend tension, forced proximity, surprise pregnancy, danger, and enough chemistry to set the pages on fire. But beneath all the obsession, possessiveness, and high-stakes drama was a story about healing, trust, and learning that love cannot exist without choice.

Valentina was an incredible heroine. After surviving an abusive relationship, she has spent years rebuilding her life, creating success through hard work, determination, and control. Every locked door, every carefully planned detail, and every professional achievement represents a piece of the life she fought to reclaim. What I loved most about her was that she never loses herself. Even when circumstances force her into Sebastian's world, she refuses to surrender the independence she worked so hard to earn.

Sebastian De Luca is exactly the kind of morally gray hero dark romance readers crave. Dangerous, ruthless, protective, possessive, and completely obsessed with Valentina. He is a man accustomed to getting what he wants, and once Valentina enters his orbit, walking away is never truly an option. Yet what made Sebastian stand out wasn't his possessiveness—it was his growth. Watching him slowly realize that loving Valentina meant respecting her choices instead of making them for her was one of the most satisfying character arcs in the book.

The chemistry between these two was absolutely electric. From the tension-filled professional interactions to the forced proximity and emotional vulnerability that followed, every scene carried intensity. Their connection felt messy, complicated, and incredibly real because both characters were carrying wounds that couldn't simply be solved by falling in love.

The suspense element added another layer to the story. As Valentina's past begins creeping back into her life, the danger feels real and ever-present. Sebastian's instinct is to lock everything down and protect her at all costs, but for Valentina, protection without freedom feels too much like the life she escaped. That conflict created some of the strongest emotional moments in the book.

His Obsession is far more than a possessive mafia romance. It's a story about reclaiming power, rebuilding trust, confronting trauma, and discovering that true devotion isn't about ownership—it's about choosing each other every single day.

Thanks to Natasha L. Black and BookSprout for an advance reader copy for which I am leaving an honest review. All thoughts and opinions are my own.
Profile Image for Nolah Jayde James.
74 reviews
June 16, 2026
Valentina Moretti was a successful event planner.
She was making a name for herself in LA.
She was known for being the calm in chaos.
Nico is her older brother and the only family she has left.
Their parents died sometime ago and they have become closer than ever.
To keep in touch and aware of what the other is doing, Nico has established dinners every Sunday at his home.
Valentina didnt always reside in California, but moved from New York to escape her ex Adrian Vescari.
He was abusive physically and emotionally.
Sebastian DeLuca is Nicos best friend and boss.
Nico has warned him about his sister being off limits when he decides to hire her to do a charity event he’s hosting.
Sebastian has gone through several event planners because he sleeps with them.
Afterwards he ignores them and it comes too much for them to work with him, they quit.
But when Sebastian is around Valentina, it’s different.
She challenges him constantly because his cousin and right hand man, Matteo, says Sebastian is a nightmare client.
Sebastian tries and fails to frazzle Valentina with his demands.
Instead she surprises him and counters each with a better solution.
Upon seeing her one night at a club, Sebastian can’t hold back his attraction to Valentina and gives into it.
When she ends up pregnant, he’s shocked with the news but wants to step if is she would let him.
Valentina came home one day to her door open and immediately knew it had to be Adrian.
She was rattled and Sebastian told her she was moving in until the threat was eliminated.
She voiced that she didnt want to be controlled. He constantly tried and sometimes failed telling her he was not Adrian, he’d never control her.
Eventually Valentina decided shed had enough protection and went home.
Gia, her best friend, told her is wasn’t the best idea but she’d come over so Valentina wouldn’t have to be alone.
When Gia gets to Valentina’s house, she is ambushed by Adrian who knocks her out and kidnaps Valentina.
Word gets back to Sebastian and he vows to get her back no matter what it takes.
Adrian wants to take Valentia back to NY with him and she tells him that Sebastian will come for her.
When he does show up, she tells she loves him no matter what happens.
In the end, Adrian gets gone.
Gia recovers with Nico by her side.
Valentina and Sebastian have a little boy.
They get married on the beach to start their lives together forever.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.
Profile Image for kymagirl.
7,265 reviews89 followers
Review of advance copy received from Author
June 13, 2026
He wanted to possess her, but loving her meant giving her control.

Valentina builds her life out of control, competence, and locked doors. In LA, she fixes every crisis before anyone sees it, but beneath the perfect events is a past she can’t fully outrun. Then Sebastian steps into her orbit, her brother’s best friend, her client, and the one man who sees too much.

Sebastian is controlled and used to getting what he wants, but Valentina doesn’t bend. Their tension starts across conference tables, then turns reckless in his nightclub. One night is supposed to burn the attraction out of them, but it only pulls them closer.

When danger follows Valentina to LA, fear turns familiar again. Sebastian pulls her into his world of gates, guards, cameras, and rules, convinced protection is the answer. But Valentina has survived a man who called control love, and she refuses to trade one cage for another.

What grows between them is messy, hungry, and hard-won. Sebastian has to learn that loving Valentina means giving her choices, not just shielding her. Valentina has to decide whether trusting him is another risk or the first safe thing she’s allowed herself to want.

Valentina’s strength comes from survival, but her growth comes from being seen without giving herself away. Sebastian’s devotion is fierce and possessive, but the real shift is in how he learns restraint and care. Together, they turn forbidden attraction and forced proximity into something deeper, shaped by chosen trust.

A dark, high heat, brother’s best friend, forced proximity, surprise pregnancy, morally gray protector romance filled with obsession, danger, trauma, control, trust, autonomy, and vulnerability. It’s about a woman rebuilding after violence, a man learning that protection without choice is just another cage, and a love that turns possession into devotion.

The Elevator Pitch: A fiercely independent event planner thinks she has outrun the man who broke her, until one reckless night with her brother’s dangerous best friend changes the shape of her future. As old terror closes in, desire turns into a battle over trust, safety, and the cost of being protected by someone who wants too much. Their romance burns through fear, control, and forbidden longing as both learn that love can’t survive without choice.

Heat Level: 🔥🔥 Hot
1,714 reviews14 followers
June 18, 2026
I went to my brother's house expecting dinner.
Instead, his best friend looked at me like he wanted to ruin me.

Sebastian De Luca.
My brother's oldest friend.
Dark eyes. Controlled. And not the kind of man you say no to.

I should have kept my distance.
Instead, I let him pull me onto the dance floor of his nightclub.
Then into his bed, before I could remember why men like him are dangerous.

One night was supposed to get him out of my system.
Instead, two pink lines changed everything.

Then my violent ex found me.
And suddenly, nowhere felt safe anymore.

Sebastian moved me into his mansion that night.
Guards at every door. Eyes on every camera.
He didn't ask. He decided.

Now it's not just protection. It's possession.
And God help the man stupid enough to come for what's his.

This contemporary age-gap mafia brother's best friend romance is page-turning with exceptional world-building that is engulfed by darkness, danger, violence, organized crime, power, wealth, and grit, and characters who are an alpha mafia male/nightclub owner, that you do not say no to with dark eyes controlled, possessive/obsessive, dangerous, violent, brutal, exuding power/wealth, but yet caring for his best friend's sister/female heroine who is sassy/resilient, who are both captivating and realisitic. Their journey is enthralling with his obsessio, mature, explicit romance that is consumed by steamy, sizzling passion, lust, desire, and spice with all the feelings to leave readers breahtless and begging for more, two pink lines that changed everything after a one night stand with brother's best friend, violent ex found her so she was being forced to stay at Sebastian's mansion, the alpha male mafia nightclub owner, chaos/drama, suspense that will leave readers on the edge of their seats, heartfelt emotions/emotional depth, action, adventure, and more. I recommend reading this book by an extraordinary author who knows how to captivate her readers' hearts and attention with his obsession and a contemporary age-gap mafia brother's best friend romance that is sure to transport readers into a world that is immensely dangerous, dark, intriguing, lustful, suspenseful, and unforgettable.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.
Profile Image for Dee.
5,252 reviews60 followers
June 15, 2026
You might want to make sure to double check that you are buckled up, dangerous men, alpha’s personified, possessive, oh, gorgeous, brooding all the makings of a story consisting with three D’s (dark, delicious, and dirty) 😊. There will be suspense, betrayal, death, darkness, secrets reveled, violence, hope, forgiveness, and maybe even love along the way. Valentina has been trying to outrun her past for so long but no matter what she did her past seemed to follow her but for now she is in a good place fixing every problem before anyone sees it so every perfect event she is behind the perfection, maintained control until her brother’s best friend walks back into her life and the battle for control begins. Sebastian sexy as all get out with a reputation proceeding him he isn’t a man you want on your radar, dangerous, ruthless, on a good day, deadly every day, he was a man who usually got what he wanted, when he wanted danced in the gray areas and he needed Val to accept the contract the gala with double the fees. The magnetic pull between them can’t be ignored but they both know they need to walk away from one another yet the more she tried to remain professional the stronger the pull so giving in one night just to satisfy the pull thinking it would solve what was growing between them, but it only made things worse. Sabastian’s life starts to bleed into hers the violence something she has tried to maintain, to control, until he decides that he needs to protect her by locking her behind guards, gates, cameras, security, oh and so many rules but what he didn’t count on was her fighting him ever step of the way she came from an abusive background where control was disguised as control as love so now she isn’t going to accept that again but will he see that change is needed, will they come to an agreement that works for the both of them and can they find happiness somewhere along the way?
3,454 reviews27 followers
June 18, 2026
Review: His Obsession by Natasha L. Black

His Obsession is a fast-paced, high-intensity romantic suspense that leans heavily into the “insta-obsession” billionaire/bodyguard style romance. From the opening pages, the story establishes immediate chemistry between the heroine and Sebastian De Luca—her brother’s best friend, a powerful, controlled nightclub owner with a dangerous edge.

The plot moves quickly from attraction to entanglement: a single night together escalates into pregnancy, protective obsession, and escalating external danger from a violent ex. This combination creates a constant sense of urgency, keeping the stakes high and the emotional intensity turned up throughout.

Sebastian is written as a classic possessive alpha—dominant, decisive, and intensely protective once the threat appears. The heroine, meanwhile, is positioned in a vulnerable but evolving role, navigating fear, attraction, and sudden dependence on Sebastian’s protection.

The strongest aspect of the book is its pacing and emotional immediacy. It doesn’t linger on slow buildup; instead, it relies on high stakes, rapid relationship development, and escalating danger to drive engagement. Readers who enjoy protective hero dynamics, forced proximity, and “mine” energy will likely find it satisfying.

However, the same intensity can also feel compressed. The romance develops extremely quickly, and some emotional beats—particularly trust-building and relationship transition—are accelerated in favor of plot momentum and tension. Readers looking for slow-burn development or deeply gradual relationship growth may find it less grounded in realism.

Overall, His Obsession delivers exactly what it promises: a dramatic, possessive, high-heat romance with danger, emotional stakes, and a dominant protector hero. It’s built for readers who want intensity over subtlety and chemistry over slow development.
Profile Image for Korkoi.
7,661 reviews36 followers
Review of advance copy received from Author
June 14, 2026
Their Union was Kismet -
Valentina had sworn off relationship ever since her recent breakup and even though she tried to keep her brother’s best friend at arms length whilst they worked together, her willpower broke and she allowed herself to enjoy one night of unbridled pleasures. Even though Sebastian didn’t do relationships, he just couldn’t get his attraction for Valentina under control and failed to adhere to his agreement to never tough his best friend’s sister.

However, neither Valentina nor Sebastian thought there would be consequences from their one night together, but fate had other plans in store for them. Unfortunately, not long after Valentina and Sebastian had processed their new reality, her ex-boyfriend decided to wreak havoc on her life, which led to her having to live under restrictive protection. Nevertheless, Valentina found herself in a dire situation after she made a decision that nearly cost her life, but Sebastian was able to rescue her in time and deal with the perpetrator permanently

As luck would have it, everything that happened forced Valentina and Sebastian to finally confess their feelings for each other and embark on a journey together towards their future. This was an absolutely riveting forbidden mafia romance story with unexpected happenings throughout the story, that grabbed my attention from the beginning and didn’t let go until I reached the end. Grab a copy of this book now and you won’t regret it.

I received a free review copy of this book via Booksprout and I am voluntarily leaving a review.
862 reviews2 followers
Review of advance copy received from Author
June 13, 2026
His Obsession is the twelfth story in the Sinful Mafia Daddies series. It is well-written and entertaining. I absolutely loved it. The characters are amazing. This is another great story from this talented author.

Valentina is ready to start over in a new town. She is out of an abusive relationship and has moved to be closer to her brother, Nico. She works as an event planner and is hired by her brother's best friend, Sebastian, to plan his charity gala. Nico warns them to keep everything professional.

Sebastian is used to getting everything he wants. He is powerful and controlling. He doubles Valentina's fee for the gala. As they get to know each other and work together on the gala, he can't deny how he feels about her. Their chemistry is electric. They decide to give in to their feelings and share a night together. Valentina had wanted her night with Sebastian to end at only one but when she finds out she is pregnant that changes.

I loved how Valentina was so independent and strong. She was determined to make it on her own and have her own business. I loved how Sebastian was so good with her. Their chemistry was so good. Their story is filled with suspense and danger. I look forward to the next one.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.
Profile Image for Kiyowo.
31 reviews
Review of advance copy
June 14, 2026
If it weren’t for the female lead, I would have given it 5 stars.
I’ll be honest here—I apologize if this review comes off as a bit harsh. And there are a few spoilers.
In all the mafia novels I’ve read, I’ve never come across a female lead as infuriating, selfish, and immature as Val. She’s independent, sure, but I found her character very hard to like.
She’s experienced deep trauma from the abuse in her past relationships, including with her last psycho ex. But instead of understanding Sebastian’s position and decision—that he wants to protect her and has explained his reasons, since her psycho ex is starting to get close to where they live—Val throws a huge tantrum and refuses to accept Sebastian’s decision. As if adding salt to the wound, Val decides to run away, and guess what—she goes back to the place her psycho ex has been targeting from the start. And guess again—there, she’s not only putting herself in danger but also endangering her best friend and the child Val is carrying. I literally screamed with glee when she was kidnapped by her ex: “Yeah, you deserve that.”
Val may be an independent woman, but going so far as to endanger her unborn baby and her own best friend is far from mature.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.
1,358 reviews3 followers
Review of advance copy received from Author
June 5, 2026
There was something about Val, his best friend's sister that drew Sebastian to her. Val is fiercely independent and refuses to be controlled. She also knows her business of event planning and has been working her way up in the LA scene. When Sebastian offers her a gala that they do yearly, she thinks this is her chance. He also doubles her fee which is very nice. She knows he is going to be the client from hell and basically tells him that but wants this success. They work very closely together and even though Nico, Val's brother, warns Sebastian off sleeping with her sister, one night they succumb to temptation. She thinks it is just a one-night stand. Her previous relationship was a disaster, and she does not want anything so disappears before he wakes up only to learn six weeks later that they are now expecting. She also has a stalker after her and knows it must be her ex from hell. When Sebastian learns all this, he moves her into his mansion. She has all her walls up and can't stand being trapped in his mansion, but it is for her own safety. Will they be able to make it work or will it all fall apart? This was a good mafia romance. Enjoy!

I voluntarily wrote this review from reading an advanced copy of this book.
2,112 reviews2 followers
June 15, 2026
This is a great addition to the Sinful Mafia Daddies Series where we find Valentina moving to LA closer to her brother, Nico and leaving behind an abusive relationship that’s turned her into a different person. Being an event planner Valentina’s able to keep her events running smoothly with her organization and great staff. When Nico’s best friend and boss, Sebastian, needs an event planner he interviews Valentina and hires her on the spot for double her fee along with a warning from Nico to keep is professional. Over the next 6 weeks they work closely together and the attraction between and fight the temptation until the night before the Gala they sleep together and it’s more than a hook up. Valentina keeps it professional the. Discovers she’s pregnant and her ex comes back to torment her. Sebastian being the controlling Mafia man he is, takes Valentina to his mansion for protection. With Valentina’s independent ways and never able to depend on a man she fights him the entire time putting herself in an unsafe situation. Sebastian does what’s necessary allowing Valentina a 2nd chance to rebuild her life! I received a free copy of this book via Booksprout and am voluntarily leaving a review.
430 reviews9 followers
Review of advance copy received from Author
June 8, 2026
I really enjoyed Sebastian & Valentina's story... it is fast paced & includes a lot of fun tropes, such as age gap, mafia, starts with a one night stand, surprise pregnancy, brother's best friend & more...

The book is well written & I enjoyed the plot & how it played out.

Sebastian is wealthy & Valentina's brother works for him... I appreciated that while her brother didn't want them to be together, he got over it pretty quickly & supported their relationship.

I like all the characters - the main characters, as well as their friends/family... I would love to see a book about Valentina's brother & her best friend!! (There's some hinting in the book of attraction between them).

Spice level: 3.5/5

*mafia romance
*age gap
*billionaire romance
*brother's best friend
*surprise pregnancy
*starts with a one night stand
*romantic suspense
*kidnapped/rescued
*she has an abusive/violent ex
*Alpha protector hero MMC
*morally grey characters

Thank you to the author (Natasha L. Black) & Booksprout for the ARC. All opinions are my own.
Profile Image for Carole.
2,377 reviews17 followers
Review of advance copy
June 15, 2026
His Obsession is an engaging Contemporary story of romance and obsession.
FMC Valentina fled across the country to escape an abusive relationship and is working on rebuilding her life when she meets her brother’s oldest friend Sebastian De Luca a billionaire rumored to have Mafia ties.
Sebastian finds himself thinking of Valentina a lot in the coming days and when he hires her event planning talents for his upcoming gala they both begin finding it difficult to remain professional while working together.
That doesn’t last long for either of them because the chemistry is too strong, and one night together will ruin them for anyone else.
Enjoyed the story which was dramatic, intense, with family dynamics, Mafia dynamics, surprises, emotion, and passion.
Good writing and well crafted characters made this an exciting journey especially when that one night results in something very unplanned!.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.
Profile Image for Lisa Petty (Book Bangers Blog).
2,408 reviews20 followers
June 16, 2026
I think this may have been a favorite of mine. Val has been through a lot and made it out on the other side. Now she's building her party-planning business, and she's nailing it. I loved how, under any pressure, she stayed cool, calm, and collected. She made sure her clients were well taken care of. When her brother makes her go to family dinner, she's dreading it, but he's all that she has. What she didn't expect was his best friend, Sebastian. Sebastian is successful in both business and the underworld. He doesn't let anything go, and he's about to burn the town down to find out who is playing him. When he meets his best friend's sister, Val, something happens, and now she's all he wants. What better way to keep her close than to hire her for his gala? Their attraction is undeniable, but what was supposed to be one night turns into more. And when Val's ex comes back, can Sebastian save her before it's too late?
Profile Image for Leanne Bryson.
5,379 reviews23 followers
Review of advance copy
June 13, 2026
Sebastian has always been drawn to Val—his best friend’s fiercely independent sister. A rising event planner in LA, Val jumps at the chance when he hires her for their annual gala and doubles her fee, even though she expects him to be a nightmare client.
Working closely together, they ignore her brother’s warnings and give in to temptation for one steamy night. Val slips away the next morning, convinced it’s just a fling—until six weeks later when she discovers she’s pregnant. With a dangerous stalker (her ex) closing in, Sebastian moves her into his mansion for protection.
Will their walls come down and this forced proximity turn into something real, or will it all fall apart? A solid, enjoyable mafia romance! 4 1/2 sizzling stars.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.
186 reviews1 follower
June 15, 2026
I really wanted to enjoy this story as the premise is one I usually like however I could not get past Val! I just didn't like her or how she reacted through out the story to Sebastian and even Nico. Sebastian said it correctly I'm not Adrian and while I could respect what she went through with Adrian she seemed to have pushed that off on Sebastian constantly. I also dislike the whole independent woman who can do the most when in danger. If Sebastian's goal was to protect her and the baby why go the whole I don't want to be controlled kept prisoner. Ma'am this is for your own protection not to control or keep you prisoner that is what Adrian did. That would be my biggest issue. Definitely liked Gia and Nico.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.
12 reviews1 follower
June 16, 2026
This story follows Valentina and Sebastian’s road to their HEA. After leaving physically and psychologically abusive relationship with a powerful man, Valentina moves from NY to LA, where her brother Nico lives. She is an event planner and while at her brothers house for dinner, Sebastian (her brother’s best friend) contracts her to plan a charity gala for him. There is banter between them and the the mutual list begins to grow. After a night together, Valentina all but pulls away from him, much to his dismay. Until she realizes that her past may be back for her.

The plot kept me engaged and the spice was not lacking or overdone. I would recommend this book and author.

This book does deal with domestic violence (not between the MCs), forced proximity, One night stand, and has a guaranteed HEA.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.
Profile Image for Claudia.
794 reviews26 followers
June 17, 2026
Valentina is a woman who has her life together. At least that what it appears. She's an event planner and can anticipate just about everything that could go wrong and handles every little detail. Though Val is hiding a secret. Sebastian is a little older and a mafia boss. He's friends with Val's brother and the attraction is immediate but he hires her to plan his gala. Being close things happen between and it forces them to deal with the truth about themselves. For Valentina it's finally trust a man not to hurt her. That not every man wants to hurt her. For Sebastian this is his first time for being captivated by a woman and not wanting to let go. So when he finds out her life is on the line he will do what it takes to save her.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.
Profile Image for Barbara.
1,943 reviews7 followers
Review of advance copy
June 7, 2026
We all know the character. The one who goes into the ransacked house. We're all screaming at her not to go in there, but she goes anyway. Valentina has a couple of those moments in this book. She is incredibly stubborn and her ex was very abusive. That combination makes it difficult for her to have a relationship with Sebastian but the circumstances throw them together. There are no grand romantic gestures, instead there is solid support which is what she needs even though she doesn't realize it.

I like Valentina and Sebastian, and I think I like Gia, Nico and Matteo just as much. They added a lot to the story.

I received an advance reader copy of this book and this is my honest review.
2,944 reviews36 followers
Review of advance copy received from Author
June 12, 2026
At first i wasn't sure where this book was going as it started off slow but it soon grabbed me attention.

This was about Valentina an event coordinator who escaped a Vicious ex. She takes on a job for Mafia man Sebastian De Luca her brother's best friend.

Sebastian isn't as fierce as he tries to appear but when he steps up he really steps up. I liked seeing Valentina give him grief for caring for her but also that she gives in to him.

I loved the plot and the romantic dynamic of not just Sebastian and Valentina but also the possible romance of Nico her brother and Gia her best friend.

Also loved that happy ever after. Such a feel good ending i adored.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.
Profile Image for Lisa Bing.
6,713 reviews73 followers
June 15, 2026
This was a fab and engaging brother's best friend romance and I loved seeing Sebastian fall so hard for Valentina. Val has had a rough past with an abuser but she's made a new life for herself and owns a successful event planner business. She needs a night off, though and ends up with Sebastian. These two have such a hot chemistry but she wasn't looking for more than a one-nighter. Ha! Of course, things get complicated when she finds out she's pregnant. Sebastian has been crushed over her 'rejection' and is thrilled when he can step fully into her life to keep both her and their baby safe. Expect to get caught up in the emotions, chemistry, drama, danger, action and hot romance as these two work their way to a fab HEA. Good fun!
Profile Image for judy.
668 reviews6 followers
June 15, 2026
This is a good storyline that I thoroughly enjoyed reading. The characters are well written. I stayed engaged the entire way through the book. Valentina fled across the country to escape an abusive relationship and is working on rebuilding her life when she meets her brother’s oldest friend Sebastian De Luca a billionaire rumored to have Mafia ties.
Sebastian finds himself thinking of Valentina often. He hires her event planning talents for his upcoming gala they both begin finding it difficult to remain professional while working together because their chemistry is too strong, and one night together will ruin them for anyone else. The heat is palpable. Will they get their HEA?!.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.
Profile Image for Rachael.
274 reviews
Review of advance copy received from Author
June 9, 2026
Valentine is an event planner in LA; she moved there to escape her abusive ex-boyfriend. Sebastian is best friends with Valentine’s brother; they meet, and sparks fly. One night, one positive pregnancy test, and one persistent ex-boyfriend come back, and they’re thrust together to figure out their relationship.

Valentine thinks safety means being in control and being alone; she’s scared to trust anyone. Sebastian thinks protection means love. Watching the two of them learn to communicate and grow, and their banter back and forth, was great.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.
Profile Image for Merry Jelks-Emmanuel.
14.6k reviews160 followers
Review of advance copy received from Author
June 10, 2026
Fresh off an abusive relationship, Valentina lands in LA to start over and be closer to her brother. It connects her to his best friend Sebastian who hires her to be his event planner and a path begins. What she doesn't expect is for her past to come back in its dangerous way and Sebastian to whisk her away into his home for protection. She is headstrong and doesn't want to be crowded but Sebastain is what she needs in a time when her abusive ex tries to make a comeback. This book had me glued to the pages and caught up in its twists and turns.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.
Profile Image for Mariah Elizabeth.
130 reviews36 followers
Review of advance copy
June 11, 2026
⭐⭐⭐⭐

His Obsession by Natasha L. Black was a quick, steamy read that kept me hooked from beginning to end. The chemistry between the characters was intense, and the possessive, protective hero definitely delivered on the obsession factor. I enjoyed the fast-paced storyline and the emotional tension woven throughout the romance. While I would have loved a little more depth in certain areas, it was still an entertaining and satisfying read. If you’re looking for a spicy, obsessive romance with plenty of heat, this one is worth picking up!.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.
Profile Image for Cathy Moir-Allen.
513 reviews2 followers
Review of advance copy received from Author
June 11, 2026
Part of "Sinful Mafia Daddies". Valentina left her old life behind in New York and has built a successful career as an event planner in L.A. She needs to be in control of her life after her ex stripped her of it while they were together. When her older brother's boss and best friend hires her to stage a charity gala for him, big brother warns both of them to keep everything professional. Sebastian De Luca is a rich, powerful man but something about Valentina calls to him in ways he can't resist, although they both really try. Then shadows from her past life start encroaching. Can Sebastian keep her safe without stripping away all her autonomy?
Profile Image for Johanna.
5,598 reviews87 followers
June 16, 2026
'Sebastian moved me into his mansion that night.
Guards at every door. Eyes on every camera.
He didn't ask. He decided.
Now it's not just protection. It's possession.
And God help the man stupid enough to come for what's his.'

The characters were very complex and compelling and complicated and absolutely perfect together. Plot was intriguing and intense and well paced. World building was excellent and solidly drawn. Thoroughly enjoyed and highly recommend!

Grab a copy, kick back and enjoy the read!

I received a free copy of this book via Booksprout and am voluntarily leaving a review.
3,273 reviews26 followers
June 18, 2026
Wow. I absolutely devoured His Obsession by Natasha L. Black. I love forbidden mafia romance and Sebastian and Valentina's story was dynamite. Valentina moved to California to escape her abusive ex and to be closer to her brother Nico. Now that she is living closer Nico has become more protective of his only sister. Sebastien knows Val is off limits but she is nothing like all the other women he's been with and when he hires her to plan his next big party there attraction becomes too strong to stay away. And one night together will have consequences they never expected. And Val's past is going to let her go that easily, Definite page turner.
Profile Image for Terra Oenning.
3,639 reviews
Review of advance copy received from Author
June 13, 2026
This book is so good and will definitely have you engrossed from the beginning until the end and sitting on the edge of your seat. Its brothers best friend taboo and so much more. Valentina is in LA and making a name for herself until her crazy abusive ex shows ,but can Sebastian keep her safe? Sebastian is business man and mafia boss who falls for his best friends sister but can he keep her safe? Absolutely enjoyed this book and couldn't put it down.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.
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