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Sacred Vow: A Dark Age Gap Romance

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Sometimes the apple doesn’t fall far from the tree, and in the case of Caesar Di Rozé and his son, Zephyr, it couldn’t be more true.

I didn’t intend for my one-night stand with Zeph to lead me back to his father’s place, but the moment it did, it was over for me. Caesar Di Rozé is a silver fox with the most delicious dark stare I’ve ever seen. After spending the night with his son, he meets me in the kitchen and proves once and for all that Daddy indeed does it better.

One glance, and I was addicted. But after one touch, I was ruined.

That night changed it all, and when he murmured into the darkness as his son slept in the next room, daring me to return for more, I couldn’t resist. Only it came with one simple caveat—a sacred vow that must be kept—under no circumstances can I fall in love with him.

Easy, right?

Wrong.


Sacred Vow is a Dark Daddy Age Gap Romance. It contains explicit content, detailed violence, high spice, and coarse language. It is recommended for mature readers.

462 pages, Kindle Edition

Published August 19, 2025

572 people are currently reading
1848 people want to read

About the author

Sheridan Anne

93 books5,704 followers

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5 stars
775 (49%)
4 stars
484 (31%)
3 stars
219 (14%)
2 stars
49 (3%)
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25 (1%)
Displaying 1 - 30 of 225 reviews
Profile Image for Carla .
1,688 reviews559 followers
Read
August 29, 2025
DNF 20%
Unbelievable!
Profile Image for destiny.
542 reviews197 followers
August 30, 2025
“one glance, and i was addicted. but after one touch, i was ruined.”

i fear sheridan anne can do NO WRONG !!! and i’m here for it every step of the way

thank you so much sheridan for allowing me to arc read and be a part of this book’s journey 💋 always a banger after banger and i simply can’t get enough !!

this is a dark romance, rom com, taboo / forbidden, boyfriend’s dad, stalker vibes, age gap, one night stand goes wrong … or very right, daddy kink, violence, duo pov, standalone 🖤

falling for her boyfriend’s father was something tilly never thought would ever happen to her. but after a one night stand that completely change her life, she indeed gets proven that daddy always does it better 🥰

this is also set in the same world as “haunted love” and that just made it even more enjoyable 🤩

THE SPICE ?!!? good god i think my brain is mush and my legs have turned into jelly 😭 got me walking like bambi after reading this book omg !!

i love a good fmc who is confident in her sexuality, demanding, knows her worth, yet can also be submissive 😍 tilly is just THAT BITCH !! she can make men weak in their knees yet also play the role of a perfect submissive for her daddy dom 🤭 she didn’t lose her spark either !! miss girl’s personality grew twice as much and she bit back harder. i absolutely love her 🫶🏼

🌶️🌶️🌶️
Profile Image for Sarah S.
93 reviews1 follower
September 5, 2025
Well, I went into this blind and let’s just say… do not judge this book by the cute little cover! I ate this shit right up!
Profile Image for Kristy.
385 reviews40 followers
September 7, 2025
This book is yummy 🥵. Tilly knows who is she, what she wants and isn’t afraid to get it. She meets Zeph and it leads to going to his father’s house. While there Caesar shows up and Tilly realizes this is the silver fox she seen at Vixen. And proves that daddy does it better.
Profile Image for em  (whats.em.reading) .
228 reviews16 followers
March 14, 2026
10/10 production from podium ?! the voice effects when their on a phone call was so cool !! … the story was utter filth, loved it LOL
I love Sheridan’s writing so much, it’s so witty, dark and spicy.
Such a fun time
Profile Image for ashlee.
388 reviews11 followers
October 18, 2025
Sacred Vow

Tilly meets Zeph and what starts as a one-night stand quickly spirals into something much more when he takes her to his father’s house. That’s where she meets Caesar - Zeph’s father - and realizes he’s the same man she saw at Vixen. One forbidden touch later, they make a vow to never tell anyone. The only rule? She can’t fall for him…until she does.

This is my second book by this author, and wow - she jumped straight into the story and never slowed down. It held my attention from the very first page to the last. The writing is sharp, the pacing is perfect, and the character development is so well done. This was an easy 5-star read, and I highly recommend it if you enjoy the tropes listed below!

✨ T r o p e s ✨
Silver Fox | Daddy
Age Gap
High Spice
Comedic
Emotional
Kidnapping
One-Night Stand Turned Complicated

Book Cover ⭐️⭐️⭐️⭐️⭐️
Would I recommend this book to you? Yes
Profile Image for Danyel.
139 reviews
September 8, 2025
This wasn’t a personal favorite.

I love other books but this author and I love their writing style but this one felt off. The banter felt almost juvenile in certain spots. The story was there but it just fell short for me. I felt as though the build up to the moment Z finds out about Tilly and his dad was anticlimactic. I enjoyed the dad in the spicy moments but everywhere else it sort of fell short for me.

I love age gap but this just didn’t hit for me.
Profile Image for Shelby Carter.
58 reviews
September 3, 2025
i refuse to believe this author has ever had a conversation with a real person before in her life
Profile Image for Melanie Clark.
262 reviews17 followers
November 16, 2025
This was incredibleeeeee.
It’s so different from what I’ve been reading and I absolutely LOVED IT.
356 reviews7 followers
August 21, 2025
Sacred Vow is such an entertaining and easy read. Kept me engaged and laughing throughout. It's well written, the characters are believable, with Tilly (fmc) and her bff relatable. Ok maybe not totally!!!!

Not only is Sacred Vow a dark romance, it's also a rom com, with a stalker element that is not at all a hot one, an age gap with the most delicious daddy, a couple of entitled delulus who cause some real damage, a bff everyone should have in the form of Chloe who just about rivals Tilly, our main girl, on hilarity. They both come across as sarcastic with a sense of humour that is highly amusing and a habit of getting themselves into highly embarrassing but funny situations. And then there is Zeph.... sigh..... swoon. All round great guy, bit of a puppy dog, great sense of humour, adonis like his daddy. mmmm dreamy.

Tilly's love for ironic slogan shirts is down right hilarious. She is a force that knows what she wants, what she likes, she is unpredictable and a little chaotic. Trouble seems to find her, no matter where she is. Caeser is just delicious, dark, intense, emotionally stunted for good reason, but of course our Tilly totally demolishes his carefully structured walls. Even with their age gap and life experiences being drastically different, Tilly and Caeser still got each other. They were on the same page the whole way through, they just didn't realise it. Their chemistry was off the charts and absolute fire.

It was so good coming back to Vixen, from Haunted Love, and seeing Aspen and Izaac again. Would have loved to see Austin and Becs but I'm still holding out for a book of their own one day. Maybe even just a little novella????
Profile Image for Ingrid.
175 reviews2 followers
August 16, 2025
Three words — I LOVED IT!!! Sacred Vow is a delicious blend of dark romance, wicked spice, and laugh-out-loud humor that had me glued to the pages The spice & banter is off the charts. The tropes? Chef’s kiss. If you love daddy kink (and daddy really does it better 😉), age gap, touch-her-and-die, and stalker vibes with comedic relief—this one’s a 5-star ride.

Enter Caesar Di Rozé the ultimate silver fox daddy— commanding, sinful, & oh-so-dangerous. Then comes Tilly— smart, confident and everything Caesar didn’t know he needed. In his eyes, she’s not just captivating—she is a sex goddess. The chemistry between them is electric & will make you want to fan yourself between chapters.

But beyond the steam, what lingers is the story of a man who thinks he’s too ruined to deserve happiness. And a woman who proves she’s not afraid of his shadows & is his match in every way. If you love your romances dark, funny, and scorching hot. This is the book is most definitely for you.

Thank you Sheridan Anne for the arc. It was such an honor to receive & absolute amazing read.
Profile Image for Jess Catlow.
121 reviews6 followers
August 14, 2025
When I say you need to read this book, I mean you need to drop whatever you're doing and read it NOW!

It was hilarious. Tilly's banter had me howling! Her T-shirts? Oh, and her grandma? Absolutely iconic 😂

And the spice? Phew. This is the first book I’ve given a full 5🌶 this year — and when I say steamy, I mean “call the fire brigade” levels of hot. Did someone say masked men? As in 3 of them? 👀🔥

I genuinely kicked, squealed, and cackled my way through this story. Not quote as unhinged as some of the things Caeser and Tilly did though 🫣 iykyk.

There's definitely dark elements to this story so make sure you check your triggers.
Profile Image for Kim the Bibliophile.
193 reviews26 followers
August 15, 2025
All the stars. Literally. ALL OF THEM. Holy fucking Dom Daddy.

That was incredible. Honestly, the witty banter between all the characters hit so well. The spice was phenomenal. I swear I am in heat. I am obsessed.

I loved the little snippets of character crossovers as well.
Profile Image for Neapolitan670 📚🖤.
817 reviews53 followers
September 5, 2025
Took me a while to finish this one, as I read ARCs in between which kind of gives you the knowledge that this one didn’t hold my attention as all the other Sheridan Anne books I’ve read.

Our FMC Tilly, goes to Vixen a s3x club regularly, I suppose it doesn’t hurt that it’s her cousins boyfriend who owns it. Whilst in the VIP section she is watching a couple, but the man keeps his eyes on her all the time. She can’t get him out of her mind but ends up with a guy from her class, who takes her home. His Dad walks in and Tilly realises it’s the same man from the club. Let’s just say there’s a lot of spice, her comical banter and feistiness comes through. It’s not all spice though as someone lurks behind the scenes.

I just didn’t enjoy this one, like others have said it’s hard to explain why but it was very predictable, which is not something I usually associate with Sheridan’s books. It’s an age gap, obsessive romance with spice and a little bit of jealous mayhem thrown in.
Profile Image for Brooke Le Juge.
8 reviews2 followers
August 23, 2025
I consumed this book like air to breathe, I knew being a stand alone Sheridan Anne it would be fantastic but I really loved that it was set in the same world as haunted love as I LOVED that stand alone also. I wasn’t sure how I would go with this a trope but I 100% loved it and will read again. The Vixen club is where dreams come true.
Profile Image for Jennifer.
433 reviews
August 11, 2025
Wow! Amazing read! Like... off the charts! Phenomenal! Tilly is hilarious. I love her attitude, her take no crap personality, knowing what she wants and going after it! Zeph may be my most favoritist character ever. And don't forget Daddy Caesar! The book is hot, spicy, had me ROTFL. It's a dark romance with so much comedy that it could be a rom-com, if not for the darkness. It's connected to Haunted Love but you won't be confused without reading first. Highly recommend (both books really)!
591 reviews8 followers
August 18, 2025
5 phenomenal stars. These characters were top tier! this was a delicious age gap romance with a splash of darkness (check your triggers), banter, spicy scenes, and so many one liners I need to write down. I am OBSESSED with all 4 of these people. I definitely need Chloe and Zeph!
Profile Image for Tanya.
412 reviews6 followers
August 29, 2025
5🌶

Wow! I did not think this book would be this funny. I was crying with laughter at parts of this book. Don't get me wrong, there are also some dark bits!

I had the absolute best time reading this! I loved the characters. Loved being back at Vixen, too.

I highly recommend, but check the TW'S!!!
Profile Image for Georgina Jones.
75 reviews1 follower
January 28, 2026
If I hadn’t just been reading 2 very good series I probably would have enjoyed this book more.
Profile Image for Abigailemilyyreads.
182 reviews7 followers
March 18, 2026
this was beautifully funny and dark.

auto buy author always🫱🏼‍🫲🏽
Profile Image for Anna.
189 reviews
February 27, 2026
DNF at 50%.

I thought I could finish it, but I don’t think I can.
I am JUDGING, and I really mean JUDGING - every single person that gave 5 stars. Just for sex alone? I could see it, but for fuck’s sake, you can’t ignore everything that is happening in the background, like:
1. Starting out strong. How STUPID you have to be (and that is a rhetorical question, because you have to have an IQ of a rock) to wax your pussy on an Instagram live and not be aware of it? Just how? But she’s not like other girls. But she’s annoying like the rest of them.
2. I am all for sexual freedom for women, but the girl is simply too cheap (she fucks a random hot guy in a bathroom after he mimics having sex with her during class). I mean… I once read a quote: “A slut is a woman with morals of a man”, and yeah, this applies to her. She fucks around like a man, and I know some will find it liberating, I found her cheap. Not to mention she doesn’t have much of personality except for being horny.
3. Conversations are cringy AF. When she was having that bathroom sex, I was dying from embarrassment. I have no idea how she could find this cheesy conversation enjoyable, but okay. And then it all feels so flat. Does the author know how humans interact? I doubt that.
4. Relationships. The premise was “a one-night stand with a son leads her to fuck the dad”. I understood one-night stand as a literal one-night thing (my bad). I was wrong. Girl wanted a cookie and ate a cookie. She was fucking both at the same time. Literally. The son was way too calm about the whole ordeal, and the dad was too supportive of the “yeah, fuck my son, and I will fuck you on the side”. Or moments where he fingers her right there, showing his son how to do it. Whaaat? Everything is so underdeveloped and fucked up!!!!
5. Why is this book almost 500 pages long?! We didn’t even have that much sex with the hot daddy. We had too much sex with the son. But maybe something changes after 50%. This could have been 300 at best.
6. To add “stalker/cyber bully” drama just feels useless. So the son has a best friend who turns out to be a dick, and I’m pretty sure he’s the culprit. Why? What does it bring? Nothing, except for making me roll my eyes.

I picked it up because the reviews were so high, but y’all are blind or in heat. And I’m in the middle of my ovulation. I was here for that D and still couldn’t finish. The sex is good. Especially when Daddy is involved. But um… that’s it.
Profile Image for Sahana.
11 reviews1 follower
September 2, 2025
I ate this book up. It was so so good.

and now I desperately need a book of Zephyr and chloe.
Profile Image for Brittany Schulz | Fiction & Friction.
331 reviews23 followers
December 27, 2025
Underrated

I will shout from the rooftops that Sheridan is underrated. I’m obsessed with her writing. Sacred Vow was another one of my favourite reads of the year. If you love banter with your darkness add this one to the TBR immediately.
Profile Image for Danielle Da Silva.
6 reviews
November 1, 2025
so good!!

I wasn’t sure about this book as I’m not one who enjoys age gaps normally but this was amazing! The banter had me laughing so much! Overall I will be adding this to my library
Profile Image for Sarah  - Get Booked with Sez.
809 reviews36 followers
October 1, 2025
Sheridan always knows how to hit when it comes to smutty goodness!

- Forbidden
- Dark Romance
- S*x Club
- Boyfriend's Father
- Age Gap
- Spicy

Tilly is a 22YO college student who just wants a good "lay". She is sick of "college boys" & when her cousin gets her an in with the local Vixon s*x club - She jumps right on in with her best friend & room mate in toe! This is where she meets single dad in his 40s; Caesar.

Caesar Di Roze has had a, life. A single dad to a 21YO son & a successful business owner, he is lucky to now have the opportunity to live in the wealth he has worked hard for. But, something / someone is missing. And when he sees Tilly across the room at Club Vixon, he is memorised. But when he walks through the front door and sees her flirting with his son the next night, he is left feeling confused. Until Tilly shows the same interest back. They then enter a sacred vow - s*x with no emotion. A forbidden lustful affair not just behind Caesar's sons back, but Caesar also is hiding it from his work colleague & friends.

But as their lustful affair continues, they find the sacred vow may be harder to keep than they both once thought. Especially when they both give each other, the something they are missing.
And with a 20+ year age gap & Caesar trying to move on from his dark past - Can they truly be each others person?

There is also a “thriller” sort of sub plot in this book, which honestly - made no sense to me. I won’t go into it but know it’s just not a simple age gap spicy romance, but full of unnecessary drama that made me nearly not finish the book.
Profile Image for Naomi Castillo.
183 reviews
November 27, 2025
The worst read of this year

Trashy book.
This is only about dirty sex is not dark romance is porn, never happens a real conversation between the main characters and when they are not doing sex they are talking about it, all this book about is SEX!, I have read already a few books from this author and she is not for me, all her main female characters are too slutty a lot and never get characters development, I was wondering if this girl do not have family or job, because everything going on here is her having sex with father and son and she enjoying it, and when they fell in love I was like: when this happened?
I hated everything in the vixen club, I hated a lot this club and this was the author's favorite place for their intimacy.
Too many silly things happened in the story line, incoherences and idiots situations.
These characters were horrible, Ceasar I never liked him neither Tilly.
Profile Image for Canadianmombooks.
589 reviews
Did not finish
December 30, 2025
Ew no. Started off good but the father son sharing is just not it.

Gave this another try. This doesn’t feel like Sheridan’s work something is just off I got to 43%
Profile Image for Kaylee’s Library.
258 reviews8 followers
August 19, 2025
The way I absolutely devoured this book should be a crime! This was one of my most anticipated releases and let me tell you it did not dissapoint!! I will say 5 stars simply doesn't do this book enough justice, it is worth INFINITE stars!!!!

I was hooked from the first couple of pages and from there I just had to keep reading, like I genuinly struggled to put this book down if I'm honest. This book is packed with some incredibly funny moments albeit some are quiet embarrassing for our FMC Tillie but that just made it so much better in my opinion. I actually cackled so hard at some of the things that happened in here I was left struggling to breathe and had tears streaming down my face because what are the fucking chances. The way chapter one kicks off had me howling with laughter but at the same time I was absolutely mortified for her! The banter in this book is also top tier! I love our FMC and her internal monologues, I love her friendship with Chloe and also with Zeph through the story. There are definitely some hilarious comments made between the three of them and I ended up loving each character even more as the story progressed. The spice was also SPICING!!! I do also love how some of the scenes in this book take place in Vixen the exclusive sex club I fell in love with during Haunted Love.

Tillie our FMC is sassy, funny, confident and loves to stir up trouble in the most delicious ways. She is easy to love as a character especially with her custom t-shirts that are literally so fitting for every situation she finds herself in. This girl definitely has a wild side which we love and after having a moment with a myseterious silver fox in Vixen she cannot get him out of her head. A hookup with Zeph leads to a friends with benefits situation and imagine her surprise when the silver fox she can't stop thinking about turns out to be his super hot and super single dad. Things were bound to get interesting that's for sure and boy did I love the ride!

Ceasar our super hot, super dominant silver fox is literally THE MAN. The way this man commands your attention was one of my favourite things in this story. He is dominant, has a dark past he doesn't discuss and he takes what he wants with no apology! This man could have literally told me to jump and I would have asked how high. The fact that he commands not only Tillie's attention but also her body pretty much instantly had me desperate for more. This girl is also the only one that can bring our Dom Daddy to his knees in the best way possible and I was OBSESSED. The lessons he teaches along the way (if you know, you know) had me feeling a certain type of way and holy crap I wanted to be Tillie so deperately. I also love that he calls her hellcat and encourages her wild side.

These two together were everything I didn't even know I needed. There is one scene in here where he says "crawl to me" and I quiet literally almost died right there because holy god damn! Someone definitely needs to burn my kindle when I die because the things I read in this book would definitely make a priest blush.

Would one million percent recommend but also check your trigger warnings as there are still a couple of darker themes and situations that take place in this book outside of our spicy encounters. Sheridan Anne is an auto buy author for me and this book just further solidified that!
Profile Image for Debbie.
127 reviews10 followers
September 1, 2025
This was such a fun read and I didn’t want it to end. Everything was on-point from the writing, the lovable (mostly) characters and the laugh out loud moments. Sacred Vow has the perfect blend of plot and spice. While this is considered a dark romance, I would call it more a dark rom-com. There is a stalker – so check your triggers.

Tilly is pure chaos. She’s sarcastic and hilarious. She lives her life loud and unapologetically. There is a lightness about her that you can’t help but find endearing. From the first chapter of this book, you immediately fall in love with her. I want to be her when I grow up.

Ceasar is the perfect silver fox daddy. He’s protective, broody and intense. Due to his past, he has built his walls up so high that no one can scale them. At least he thought so until a chance encounter with Tilly at Vixen. One look at Tilly and he is intrigued. Days after that encounter he still can’t get her off his mind. Imagine his surprise when he comes home and finds his Hellcat with his son, Zephyr. Yeah, what are the chances?

Zephyr is basically a younger version of Caesar. Except where Ceasar is a Doberman, Zephyr is a Golden Retriever. What starts out as just ‘scratching an itch’ with Tilly, soon turns into a deep friendship. I loved the conversations and banter between them. And I was so happy to see how things ended for him.

And then there’s Tilly’s bff, Chloe. She is just as hilarious and sarcastic as Tilly. They are each other’s ride-or-die. Everyone needs to have a Chloe in their life.

I can’t say enough good things about this book. The chemistry between Caesar and Tilly was pure fire! Even though these two are coming from different places in their lives, they just fit - they get each other. The plot was well paced and flowed well. I had a feeling I knew who the stalker was any why, but I didn’t see the twist with that coming. I loved the banter between all of the characters. Some of the things that stick out to me are Tilly’s ironic T-shirts and the hilarious text messages with her grandma. Those were priceless gems. I wonder if her grandma would adopt me?

Overall, if you’re looking for a spicy age-gap read with a dominate silver fox, then this one’s for you. You’ll laugh, you’ll swoon and you’ll probably need to break out the fan from the heat. 🔥🔥🔥
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