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All In

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Harlow Young: What’s worse than being left at the altar? Being left at the altar at a wedding you didn’t want. Josh’s family is mega-rich and entitled, and they’ve planned this massive thing with no input from me, and now I’m standing here looking like an idiot. Oh well, I guess. I’ll just take my best friend and best man, Grayson, with me to my honeymoon in Las Vegas. Maybe a best friend vacation is exactly what we need. It can’t get any worse than this.

Grayson Taylor: What’s worse than watching your best friend get left at the altar? Being so in love with him that you don’t just feel rage for his now ex-fiancé, but also relief. Stark relief. Not that I think it means I have a chance. Harlow has never seen me as anything more than his best friend. And what kind of best friend would I be if I turned down his watery-eyed request to go with him on his Vegas honeymoon? I’ve never been able to deny him and those doe eyes a single thing.

All In is a jilted groom, accidentally-married-in-Vegas story about two best friends who have almost definitely always been in love. Expect one ADHD chaos tornado and the sweet cinnamon roll who keeps him grounded, lots of yearning, and one sugary-sweet happily ever after.

267 pages, Kindle Edition

First published September 16, 2026

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About the author

Morgan Sloan

14 books202 followers
Morgan Sloan lives in the Midwest with her husband and kids, along with an obscene number of chickens. She's a Christmas junkie who can usually be found listening to Michael Bublé's Christmas album (don't judge) and surviving off sheer willpower and the tropical Red Bull (it's the best kind, and she will not be taking questions at this time). She woke up one day with an idea that wouldn't leave her head. So, now, here she is, trying her hand at bringing the people in her brain to life.

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5 stars
249 (39%)
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107 (17%)
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13 (2%)
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Displaying 1 - 30 of 146 reviews
Profile Image for Rachael Hamilton.
230 reviews44 followers
Review of advance copy received from Author
August 31, 2026
This was such a fun, quick paced read! I really appreciated that the author didn't waste any time creating the connection here. We get the full backstory of Harlow and Grey's friendship right away quickly establishing their chemistry. This book immediately creates angst with a messy situation but very quickly redirects to being a very light fluffy sweet reads.

Harlow and Grey share a beautiful, wholesome connection that transfer over to their physical and emotional bond once the relationship escalates. The mutual yearning they have for each other is portrayed well. I was yelling at my kindle because they were both so obviously in love with each other, yet completely oblivious! Grey dedicated himself to giving Harlow everything he wanted while trying to protect his own heart.

Also, the whole time I was thinking I have to have Josh’s side to this story, so I was thrilled to see at the end their book is next. I will be looking out for that coming up.
Profile Image for Gaby | read.onrepeat.
675 reviews11 followers
Review of advance copy received from Author
September 2, 2026
Harlow was left at the altar one day, and the very next day he went to Vegas and married his best friend 😂

Let's talk about emotional whiplash, you guys!

Harlow's fiancé left him at the altar. Then he decides to enjoy the already paid for honeymoon with his best friend, Grayson. They end up accidentally married in Vegas.

The problem?
Grayson has been in love with Harlow for what seems like all his life, and now he gets everything he wanted but can't have.

I struggled a little bit with Harlow. He was having lusty thoughts about his best friend two days after his failed wedding. Are you really willing to risk your lifelong friendship with Grayson for a rebound?

I don't know, I had to ignore that so I could move on with the story because it was driving me nuts.

Grayson, though... holy sweet baby Jesus!
He was HOT, could dirty-talk you into anything, and apparently is the best kisser in the world.
He is also very organized. He scheduled his depression for after the wedding, and had planned time off to cry lol

My poor child.

And you know me. Give me a man suffering hopelessly in love and I’ll have the time of my life 💅

Still, even though the emotional timeline was questionable, once I got past the speed of Harlow’s realization, I really enjoyed them together. The tenderness and chemistry were there, and the spice was top notch. 3.5 ⭐

Ingredients:
Best friends to lovers
Fake marriage (kinda?)
Unrequited love (secret pining)


**Thank you to the author for trusting me with an early copy. All opinions are my own.
Profile Image for Jen.
92 reviews22 followers
September 28, 2026
Yes, this is shameless fluff. Do I care? Not in the slightest! Yes, the Vegas marriage is rather trite. Yes, most of the plot was carried by... not miscommunication, but certainly lack of communication. However, it was sweet and sexy and satisfying, and I really enjoyed it. 🥰
Profile Image for AngstLover-Jing.
773 reviews22 followers
September 25, 2026
Isn't this literally one of the most cliché, predictable plots in the entire world, ever since... like the invention of the Las Vegas quickie marriage?🤷‍♀️

You know the drill: one MC gets dumped at the altar by their fiancé(e), and out of pure spite, goes on the non-refundable honeymoon with their long-suffering best friend who's been secretly in love with them for years. Then, of course, you get all the mandatory tropes: there's only one bed—like, who could possibly see that coming in a honeymoon room?—a drunken Vegas wedding, waking up with zero memory except for a viral video announcing it to the world, and fake-marriage turning into a real HEA.

So how do you drag this out to over 200 pages? Enter the ultimate, fail-proof magical artifact of fiction: ✨the complete inability to fucking communicate✨. Grayson has apparently been in love with Harlow since page one, but it completely boggles my mind (and the book never bothers to explain) why he couldn't confess before, why he still couldn't confess after Harlow got publicly dumped and humiliated, and why—even after they're legally fake-married—Grayson still doesn't confess his feelings, and instead just calls it quits to end the marriage? Make it make sense, because this is absolute nonsense.

If you're writing a friends-to-lovers romance, there's one assignment you have to nail: explaining why these two best friends couldn't just be together from day one, and what's actually keeping them apart. On that front, this book fails completely.

Now, don't get me wrong—I'm not saying I'm allergic to cliché tropes. The secret is that you actually have to make them a fun, compelling rom-com. Honestly, I've read plenty of Las Vegas quickie marriage stories, and the good ones almost always feature distinct, vivid characters, tons of humor, and high-energy, chaotic drama. This book? It has literally zero of those redeeming qualities.

Not even kidding, in my fandom back in 2023, there was a fanfic about this kind of absolute dumpster fire of two NBA players getting drunk and fake-married in Vegas. Even if you completely strip away my fan-goggles, this free story written by an amateur writer for that fandom possessed way better storytelling skills and narrative craft than this entire book.
Profile Image for Heather O'Dell.
84 reviews7 followers
August 30, 2026
All In by Morgan Sloan is the story of Grayson who has loved his childhood best friend Harlow since he knew what love was. In fact, he asked Harlow to marry him when he was 12, and again when he was 16. They decided, jokingly to Harlow, that they would get married at 25 if they hadn’t met the men of their dreams by then.

Now at 24, Harlow is about to marry Josh with Grayson as his willing (but devastated) best man. Then Josh leaves Harlow at the altar and Grayson is there to pick up the pieces.

Harlow is not so much devastated as embarrassed; he loved Josh, but wasn’t “in love” with him. So he decides to go on his honeymoon to Las Vegas and asks Grayson to come along. Grayson knows it’s a bad idea to be on vacation with Harlow for a week when he is desperately in love with him, but he can’t say no to his best friend.

The first night they are there, they drink far too much and wake up (in the same bed in the honeymoon suite) to social media exploding at the picture of them kissing outside the chapel where they became “#husbands!” With no memory of how this happened, and the embarrassment of just being left at the altar, Harlow asks Gray to pretend to be married to him for a few months. Not to mention that he is so turned on by the image of him kissing his best friend that he wants to actually be all-in in the fake marriage. And Gray agrees. All In… sexy times and all.

But Grayson’s heart is at risk as he starts a physical relationship with the man of his dreams.
And Harlow still doesn't recognize Gray’s life-long love as anything other than friendship!

Morgan Sloan wrote a fun and heartwarming story that I thought was awesome! Grayson and Harlow are such a great couple: Harlow is a little blond sprite of a person and Grayson is a solid and faithful guy. The love that they have for each other is so pure and so longstanding that their getting together seems foretold, but Harlow had never even considered that the way he loves Gray isn’t the way normal best friends love each other.

I flew through this ARC read in two nights and loved every page!
Profile Image for Teigan.
466 reviews85 followers
October 13, 2026
“Do you want to know that all I’ve ever wanted is you? That from the time I knew what it meant to want someone, it was you I wanted? That I’ve spent my entire life hoping and wishing that you would see me? That you would want me back?”
^ Page 219.

3.5✨ because I'm really ill right now and I wish I'd been in the mood for this one as I actually enjoyed it. Usually I'm not a fan of the friends to lovers trope.

Grayson has been in love with Harlow since they were kids. He's always devoted himself to him and even asked Harlow to marry him at 12 years old. Despite being inseparable, Harlow's always assumed Grayson's proposals over the years weren't serious and it isn't until the truth comes out that Harlow realises he's loved Grayson his entire life too.

Josh leaves Harlow at the altar because he loves Harlow but not enough to dedicate the rest of his life to him. Grayson and Harlow go on the honeymoon together and your stereotypical "drunk marriage in Vegas" trope happens.

In the beginning, Josh sounded like an asshole. I mean he'd literally get in a pissy with Harlow for being late, he did 't care for Harlow's wedding input, and he'd never really be intimate with him. They were engaged for a year, I'm not sure how long they were actually together.

By the end, it feels like we should be half agreeing with Josh for ditching him because he realised that he'd never earn the love Grayson and Harlow share. I'm not even sure how to word what I'm trying to say (brain ain't braining here). I'd never fully agree with Josh though because those qualities and ditching him at the altar are unredeemable in my eyes.

One thing I didn't understand was if Harlow works in a hospital, why does he Google his symptoms when he's got a fever? I mean I'm not a doctor but I only Google my symptoms when I get new ones or I've had symptoms longer than usual (I'm ill a lot). But you're telling me Harlow works in a hospital (potentially a doctor) but has to Google that he's got a fever??

Not sure what Grayson's job was?

I'd say the biggest/only thing that annoyed me in this book was after their double date. Grayson basically confesses how his confessions growing up were real and Harlow is like "tell me you're kidding". They get into an argument because Grayson is like "nah it's just childhood stories get over it" - Harlow calls bullshit.

That part really got me? Grayson saying "I'm not sure what you want me to say, Harlow." LIKE FIVE TIMES?! Heard (read) it loud and clear the first time buddy. Like Harlow just wants you to tell him you always loved him and instead you're dragging drama into the book for a couple chapters for no reason?? No thanks.

Oh and another thing? I felt like every time the pair would say or feel anything for the other, they'd have sex. Like that's what their marriage was. I'm not sure if it's just me who notices these things but it felt more like lust rather than love after they got married.
Profile Image for Ash.
187 reviews6 followers
September 14, 2026
"𝘐𝘵’𝘴 𝘳𝘦𝘢𝘭. 𝘐𝘵’𝘴 𝘢 𝘤𝘩𝘰𝘪𝘤𝘦. 𝘈 𝘤𝘩𝘰𝘪𝘤𝘦 𝘸𝘦 𝘣𝘰𝘵𝘩 𝘮𝘢𝘥𝘦 𝘸𝘪𝘵𝘩 𝘦𝘺𝘦𝘴 𝘸𝘪𝘥𝘦 𝘰𝘱𝘦𝘯 𝘢𝘯𝘥 𝘤𝘭𝘦𝘢𝘳 𝘩𝘦𝘢𝘥𝘴."

First things first, the dedication mentions 'yearnalism' - my first time hearing the term and not only is it a little hilarious but also could not be more true for Harlow and Grayson. Mostly Grayson. Boy is down baaaad and I love him dearly for it.

There's a difference between loving someone and being IN LOVE with someone - and I loved watching Harlow realize that everything he's always felt for Gray is exactly what was missing with Josh. Meanwhile, Gray has been in love with Harlow since they were kids - and all that yearning while still respecting his best friend made my heart hurt a little.

Also, the mouth on Gray is 🔥🔥🔥.

Sooo if you like besties to husbands to lovers and crazy levels of yearning, you're gonna want to check this one out when it releases in a few days!
Profile Image for Kenreadsalot.
565 reviews12 followers
October 3, 2026
Pretty sweet trope-heavy romance. First time read from this author and I definitely want to read the next book. The whole “three month” thing was pretty ridiculous, irritating and I’m sure it could have been handled better. Other than that it was pretty solid!

Enjoyment (5) 4
Feelings (1) .5
Plot (1) .25
Setting (1) .5
Respectability/writing (1) .5
Characters (1) .75

Total rating: 6.5
Profile Image for Amanda Winter.
1,302 reviews25 followers
September 16, 2026
I absolutely loved this book! This was honestly one of the sweetest, most feel-good romances I’ve read in a while. Harlow and Grayson were absolutely adorable, and their chemistry and yearning were EVERYTHING!

Best friends secretly in love, a jilted groom, and an accidental Vegas marriage? YES PLEASE! I loved watching their friendship evolve into something more, especially Grayson finally getting the chance to see if Harlow felt the same way.

Harlow was so adorably clueless, and watching him realise he’d been in love with Gray all along had me smiling like an idiot. Their history and friendship felt so natural, and I loved getting to see them have their little Vegas bubble before bringing everyone else into it.

This book had me giggling, swooning, and shedding a few tears. Such a fun, sweet, romantic read that I absolutely recommend! ❤️

I’m already excited for Josh’s book next!

Tropes:
✨ Best Friends to Lovers
✨ Secretly in Love
✨ Jilted Groom
✨ Accidental Marriage
✨ Vegas Romance
✨ Friends to Lovers
✨ Yearning
✨ Feel-Good Romance
Profile Image for Alix .
1,377 reviews59 followers
September 19, 2026
THIS is why I love childhood BFFs to lovers so much! This book has all the sweetness, all swoon, all the spice that I love to see along with all the feels that expect and want in a romance with childhood BFFs. There's so much pining from one MC and so much obliviousness from the other. Grayson is a loyal and steadfast friend; he's been quietly devoted and in love with Harlow since his early teens, but always kept it hidden for the sake of their friendship. Harlow is...a human whirlwind in tight jeans and with a mop of impossible to tame hair. Though he doesn't realize it yet, for Harlow, Grayson is his center, his shelter, his comfort. It takes them some time to figure everything out, but the journey to being "All In" is a true pleasure filled with sweet and sexy times. Honestly, I loved this book so much that I stayed up way too late to finish it, but I went to sleep just adoring these MCs.

What to Expect:
*childhood BFFs to lovers
*One Sided Epic Pining
*Oblivious MC
*Jilted at the altar
*Married in Vegas
*Husbands w/benefits
*Possessive MCs
* Mine
*Size Difference
*So much kissing
*swoony moments
*He carries him
*"It's always been you"
*Lap sitting
*Touching for comfort
*Hands-free
*Shower shenanigans
*moms are besties
Profile Image for Rae.
372 reviews9 followers
September 17, 2026
At first, I struggled a little with Harlow because I really felt like he was treating Greyson like a rebound. He says multiple times that he never thought of Greyson as anything more than a friend, then suddenly two days after Harlow is left at the altar, he’s all over Greyson who is hopelessly in love with him. This turned out to be an enjoyable story, though, and they get the cutest little HEA. Their lifelong friendship storyline was so cute; I’m a sucker for friends-to-lovers. They were both a little dumb and oblivious about it I think 🤣🤣

I wish we’d have gotten to know them both on a little deeper level; we don’t even really find out what they do for a living. They’re very sweet (and hot! Who knew Greyson was so dirty 🤣🌶️) together though, and I’m super duper curious about Josh and Andy?? 👀👀👀

Profile Image for Amanda Wood (IG: inkednbooked).
63 reviews5 followers
September 17, 2026
𝔸𝕝𝕝 𝕀𝕟 🤵🏻
𝙱𝚢: 𝙼𝚘𝚛𝚐𝚊𝚗 𝚂𝚕𝚘𝚊𝚗

🌟🌟🌟🌟🌟

𝑯𝒆’𝒔 𝒔𝒖𝒏𝒔𝒉𝒊𝒏𝒆 𝒊𝒏 𝒉𝒖𝒎𝒂𝒏 𝒇𝒐𝒓𝒎, 𝒕𝒉𝒆 𝒃𝒆𝒔𝒕 𝒑𝒂𝒓𝒕 𝒐𝒇 𝒎𝒚 𝒅𝒂𝒚, 𝒂𝒏𝒅 𝒕𝒉𝒆 𝒃𝒆𝒔𝒕 𝒇𝒓𝒊𝒆𝒏𝒅 𝒂 𝒑𝒆𝒓𝒔𝒐𝒏 𝒄𝒐𝒖𝒍𝒅 𝒂𝒔𝒌 𝒇𝒐𝒓.

I really really enjoyed this book!

I love their connection. I love how they each can tell exactly when the other is off. They’re very much codependent.

Grayson and Harlow are best friends, they know each other like the back of their hands.

The love that Grayson has for Harlow is so pure and heartbreaking at the same time. He tortures himself as he watches his best friend, the love of his life, begin to create a future with someone else. All while keeping his feelings for him locked away.

When Harlow gets left by his fiance at the alter, Grayson is there to hold him together. Even going with Harlow on the planned honeymoon trip to Vegas. Ending up married to one another.

I loved seeing their relationship evolve. The love that they’ve already had for one another becoming deeper and stronger.

𝐓𝐫𝐨𝐩𝐞𝐬:
❤️‍🔥 𝙲𝚑𝚒𝚕𝚍𝚑𝚘𝚘𝚍 𝙱𝚎𝚜𝚝𝚏𝚛𝚒𝚎𝚗𝚍𝚜 𝚝𝚘 𝙻𝚘𝚟𝚎𝚛𝚜
❤️‍🔥 𝙼𝚊𝚛𝚛𝚒𝚎𝚍 𝚒𝚗 𝚅𝚎𝚐𝚊𝚜
❤️‍🔥 𝙷𝚞𝚜𝚋𝚊𝚗𝚍𝚜 𝚠 𝙱𝚎𝚗𝚎𝚏𝚒𝚝𝚜
❤️‍🔥 𝙿𝚘𝚜𝚜𝚎𝚜𝚜𝚒𝚟𝚎 𝙼𝙲𝚜
❤️‍🔥 𝙹𝚒𝚕𝚝𝚎𝚍 𝙶𝚛𝚘𝚘𝚖
Profile Image for BethanyReadsMM.
78 reviews7 followers
September 4, 2026
Review of Advanced Copy received from the Author

Tropes:
Best Friends to Lovers
Accidental Marriage
Left at the Altar
Fake Relationship..or is it?



Per usual, Morgan wrote another great book!

I’m not usually a huge friends to lovers trope person but this book was sooo good. I loved how I felt the connection of Harlow and Gray through the book. Many books the words are there but I don’t always get into it with the emotions etc., however, this book I felt it all! I really liked that the spicy scenes weren’t rushed into. Many times that I have read a friends to lovers book, they go from oblivious or pining from afar to spice galore but this book eased into it.

I like how the book went from them being in Vegas to coming back and continuing everything just as it was on vacation for their “fake relationship.” While they were still I’m not a huge fan of “Ope back to reality so we now have to break up and miss each other for weeks and then realize we need to be together.” Instead, it was more of a continuation which kept me in the Harlow and Grey chokehold!

This was such a sweet love story and the spice was definitely spicing. Who knew Gray had a mouth like that after seeming that he would be more bashful as he was living out a dream. 🥵

This entire review has been hidden because of spoilers.
Profile Image for Julia Toth.
616 reviews12 followers
September 16, 2026
This was such a sweet, feel-good story and I just gobbled it up! Grayson and Harlow are so perfect for each other. Harlow had to be left at the altar for things to work out between the two best friends. Harlow and Grayson have so much history and it was great to see them really know each other. I loved their chemistry and the mouth on Grayson was great. I loved how dramatic and chaotic Harlow could be, while Grayson was a calming, grounding presence. I loved how possessive they were of each other.

This was a fun and fast paced read, with a lot of great moments between Harlow and Grayson, the two best friends who end up married after a drunken night in Las Vegas.
Profile Image for Mikaela (risqué.romance).
767 reviews34 followers
August 31, 2026
✨May contain spoilers✨

I discovered Morgan when I read Rescued and from that moment, I just knew I was going to be complete and utterly obsessed with her characters.

I really loved Gray and Harlow from the moment we meet them in this amazing book. I knew it was going to be a really good time when one of the tropes was married in Vegas because why not?!

Gray has been in love with Harlow for years and to watch him getting married was killing him… except it doesn’t happen when Harlow gets left at the altar. When Harlow decides to take advantage of his Vegas honeymoon and take Gray, things get interesting.

They come up with a husband with benefits arrangement for a few months but as each day goes on, Harlow realizes he has feelings for Gray but doesn’t realize it. And poor Gray is getting hurt as each day goes on but he will do anything for Harlow.

Gray had my whole heart because he would do anything for Harlow. He just wanted Harlow to feel like he did. It was so hard seeing him do things and Harlow not notice him. The cuddling was so cute. I’m such a love for cuddle scenes.

I need Andy and Josh’s story because something is going on there! I was shocked by the friendship between Josh and Harlow but I was so glad that things could be cordial with them. I did like how Josh told people to not be mean to Harlow.

I laughed when the mom saw Josh and she about let loose her anger. She had every right but it was funny to see protective mom go all crazy.

The ending of their admissions had me in my feelings but it didn’t really shocked me because it was such an emotional scene.

I received a copy of this book and this is my honest review.
Profile Image for Drew H.
552 reviews26 followers
Read
October 7, 2026
WHEN YOU REALLY ENJOY A BOOK AND THEN IT TURNS INTO A SECRET BACKDOOR PILOT FOR A BROTHERF*CKER BOOK YOU CAN'T EVEN GET ON KINDLE UNLIMITED BECAUSE IT'S TOO TABOO, GOD I LOVE BOOKS.

Honestly a really sweet and fun time, no notes, they handle the accidental wedding really well and I have genuine faith in them as a couple despite the start, probably won't be continuing 😂😂HOWEVER, I did see this book offered on GRR, didn't take it there, but if the sequel got offered there, I'd be allllllllllll over it just out of curiosity.
Profile Image for Nikki Thompson.
59 reviews2 followers
Review of advance copy received from Author
August 31, 2026
💍 Best friends to lovers
🎰 Accidental Vegas marriage
❤️ Secret pining
🔥 Fake relationship... or is it?
🌶️ Sweet + spicy romance

Harlow and Grayson have been best friends since childhood. They've grown up together, done everything together, and have always been inseparable. The only problem? Grayson has been secretly in love with Harlow for years... and Harlow is about to marry someone else. 💔

But when Harlow is unexpectedly jilted at the altar, his already-booked honeymoon to Vegas suddenly becomes a trip for two best friends instead. After a wild first night involving a little too much alcohol, they wake up with absolutely no memory of what happened.

Until social media fills in the blanks...

Because apparently, they're married. 👀💍

For Grayson, marrying Harlow is everything he's ever wanted—but definitely not under these circumstances. Harlow, still reeling from being left at the altar, can't face another failed relationship, so the two come up with a plan: stay married for three months, pretend they're completely in love, and then quietly get divorced.

Simple, right?

Except pretending to be in love means kisses, intimacy, and crossing lines that Grayson has spent years trying not to cross. And while Grayson knows exactly how he feels, Harlow slowly begins to realise that the person who has always made his days better, stood beside him through everything, and felt like home... might actually be the person he's been looking for all along. 🥹❤️

All In is a sweet, spicy, and incredibly heartwarming friends-to-lovers romance filled with years of friendship, secret feelings, accidental marriage chaos, and the beautiful realisation that sometimes the love of your life has been right in front of you the entire time.

If you love best friends falling in love, mutual pining, accidental Vegas marriages, and romance that is equal parts sweet and spicy, this one is definitely worth checking out! 💕✨
This entire review has been hidden because of spoilers.
Profile Image for Gem McGuire.
45 reviews
Review of advance copy received from Author
September 2, 2026
ARC Read Review

I went into this book blind. I had a vague understanding of the plot but deliberately hadn't read much so that I wouldn't spoil anything for myself. This was also my first Morgan Sloan book, and I can tell you it will not be my last. This book was a really lovely, warm book to read. It made such a pleasant change.

This book is fast-paced and really fun to read. I loved everything about it. Grayson is possibly the sweetest character that anyone has ever written. His love for Harlow was so pure and genuine that you could feel it seep off the page. I am not gonna lie, there were points in this book where I was screaming at the characters to talk to each other. I hated finishing this book, because I wanted more time in this world with them. I raced through this book and immediately looked at her back catalogue to see what I was going to move on to next.
Profile Image for Lexica.
75 reviews2 followers
September 27, 2026
This was such a cliché best friends to lovers story with a drunken Vegas marriage, but honestly I still had a really good time reading it. It was such a quick, light, and easy read, and I found myself smiling at some parts, mostly because of Grayson and how really sweet he was with Harlow.

After Harlow gets left at the altar, heartbroken and embarrassed, he asks his best friend Grayson to go to Vegas with him on what was supposed to be his honeymoon. And of course Grayson says yes, because this man would literally do anything for Harlow. The problem? Grayson has been in love with Harlow since they were kids, while Harlow is completely oblivious to it.

One drunken night later, they wake up married. And when people find out about it, Harlow asks Gray to pretend that the marriage was intentional and stay married for three months to save him from even more embarrassment. Except Harlow doesn't want to half-ass it. If they're going to pretend to be married, he wants them to actually act married, including the sex and everything else that comes with it. For Harlow, they're faking a marriage. For Gray, being married to Harlow is basically his dream come true, except none of it is real. 🥲

The entire story is basically just two people not communicating their feelings. 😂 Gray is terrified that telling Harlow the truth will ruin their friendship and make him lose the person he loves most, while Harlow doesn't even realize that the way he feels about Gray might not be entirely platonic. I did love watching Harlow slowly figure it out, though. He had always been so comfortable with Gray. He was constantly cuddling him, seeking him out whenever he needed comfort, and basically treating Gray as his safe place without ever stopping to question what that actually meant. And eventually, the thought of their fake marriage ending started hurting him more than being left at the altar ever did.

GRAYSON, though. 🥹 Such a green flag. He was so incredibly patient with Harlow, and you could feel just how much he loved him. He would literally do anything for this man. Harlow could crawl into his arms whenever he wanted, and Gray would just happily hold him. Even while knowing that Harlow didn't understand what their marriage meant to him, he still tried so hard to give Harlow whatever he needed. Harlow himself was maybe not the most likable character ever, but I didn't dislike him either. He's basically this little bundle of sunshine, cheerful, affectionate, cuddly, and always looking for comfort from Gray. He was also painfully oblivious, which obviously made everything more complicated than it needed to be.

Eventually, Gray gives Harlow enough clues for Harlow to start questioning everything, and when Harlow finally confronts him, Gray admits that he's been in love with him since they were kids. He even tells Harlow how heartbroken he was when Harlow was going to marry someone else. And that's when Harlow finally starts looking back at their entire friendship and realizing that maybe he had been in love with Gray too, he just never understood that what he felt was more than friendship.

So yes, this was predictable. Yes, these two could have solved approximately 90% of their problems by TALKING. And yes, the drunken Vegas marriage + fake marriage + secretly in love with your best friend combination is cliché as hell.

But I still enjoyed it! It was sweet, light, and easy to read, and Gray alone had me smiling through so much of it. That man was DOWN BAD for Harlow, and apparently that's all I needed.
Profile Image for Betty.
699 reviews55 followers
September 21, 2026
This was a fun sweet and spicy story. I loved these two together!

Harlow ❤️ Grayson

Grayson and Harlow have been best friends since they were 6 years old. When Harlow is unexpectedly left standing at the alter by his fiance, Grayson steps in and they agree to spend Harlow’s honeymoon together in Vegas. It was intended to be platonic until they get drunkenly married and see the photos the next day; neither remembering what happened.

What made this sweet was that they were genuine friends and you could tell from their interactions without the need for flashbacks. Grayson has been fully in love w Harlow since he was 6 years old and you could feel his emotions as he’s getting everything he ever wanted but isn’t sure it’s real. The angst was well balanced by Harlow and his feelings for Grayson and the genuine love and respect they have for each other. It’s the story of them deciding to stay married for three months but each separately knowing that they want more.

There’s humor, heart, and a few happy tears at the end.

❤️No third act breakup
🗣️No miscommunication. Harlow does not know that Grayson is in love with him and it’s that tension that drives the story. This reveal and Harlows reaction was very well done.
👬🏽MM - both out/gay
😉Mild angst - Grayson’s feelings were palpable, but it’s balanced by the humor, heart and absolute belief that these two will be together.
😁Nicknames - pretty boy, baby, Husband
❤️Tropes - best friends to lovers, forced proximity, Vegas marriage, left at the alter, it’s always been you
🌶️Spice - this is spicy! And the spice is top tier. It’s so well done. But there’s also so much non-sexual physical affection: hugging, forehead kisses, handholding, etc.
👥Dual POV; HEA; 1 yr later epilogue.

Overall, a really heartwarming, lovely - and steamy - story. I loved that you could feel their friendship jump off the page. I believed in them.
This entire review has been hidden because of spoilers.
Profile Image for Natalie.
763 reviews24 followers
Review of advance copy received from Author
September 14, 2026
Boy, did I love this book! This was honestly one of the sweetest books I’ve read in a long time. I absolutely loved Harlow and Grayson.
Morgan wrote two MCs who were just so beautiful,separately and together these characters were adorable.Their chemistry was off the charts, I loved the yearning, it was EVERYTHING. I appreciate the way Morgan wrote their history and their friendship, nothing felt unnecessary.
Morgan really knows how to write characters you can’t help but fall in love with.
This was such a fun,sweet,romantic read that had me smiling the whole way through. It jumps straight into the story without any unnecessary build up, and I loved that.
I’m already so excited for Josh’s book next!
961 reviews8 followers
September 16, 2026
This just feels like a rough draft! It also doesn’t feel like Morgan Sloan writing at all. I did not like this one at all. It was so repetitive! Like literally everything that happens is repeated one way another 25 times! And the miscommunication is fucking ridiculous! Just have a damn conversation!

I guess looking back on previous book reviews of hers I had a problem with repetition with those as well. Things don’t need repeating several times! Like if you’re doing it to make word count then be more creative.

DNF at 35%. This book is just pissing me off! Grayson has been pining after Harlow since page one! Then after they are fucking married he’s saying it had to end and they need to put a time limit on it?! The fuck?! No. I’m out!
Profile Image for Emma ~ a chapter of tea.
200 reviews42 followers
October 1, 2026

All In by Morgan Sloan is Grayson & Harlow’s story.

A warm, feel good & funny romance between two people who should have always been together….they just took a while to figure it out.

On a side note, I love when one mc has freckles and the other mc is obsessed with them, makes me swoon🫶🏻

MM romance
Childhood best friends to lovers
Years of yearning (one sided)
Oblivious mc
Wake up married in Vegas
Size difference
Miscommunication (by the truck load)
Spicy times
Dirty talk
Hea

Grayson
Because if there’s anything worse than loving your best friend, it’s him figuring it out.

Grayson
There’s absolutely no fucking way I finally got to kiss Harlow, and I don’t even remember it.
Profile Image for Levi Thomas.
22 reviews
September 26, 2026
Had a little struggle keeping up with the pov because the characters were written quite similarly and the chapter were short BUT it didn’t matter cuz this was really sweet. Obviously predictable but I think that’s the beauty of a book like this and I didn’t care because it was a fantastic story. There was something strange happening between Adam and Josh for sure idk if there’s a sequel tbh I picked this book at absolute random and have no idea about the author or when this book was released but I would love to know what was happing there.
Profile Image for Sarah Taylor.
308 reviews2 followers
Review of advance copy received from Author
September 1, 2026
Well what can I say this is a sweet love story Harlow is a bit oblivious lol but he’s so sweet and Grayson is so hopelessly in love with him but just doesn’t want to do anything to ruin their friendship their vegas holiday is the best thing that happened to them I loved it but a few times I did want to shake them and say just talk to each other but they get their happy ending thank you for letting me arc read this sweet story
This entire review has been hidden because of spoilers.
Profile Image for C.W. Scott.
Author 7 books106 followers
September 16, 2026
Where do I even start? These boys have my whole entire heart. They did from the very first page. Grayson and Harlow were always meant to be and I am a SUCKER for couples like that. Add in the married in vegas trope? Oh, buddy, I am in for quite the ride.

The absolute devotion from Grayson had me in a chokehold. Their entire lives, he's been yearning. The absolute master of yearning I swear. And sweet, chaotic, gorgeous Harlow. Oh, my baby Harlow. He was absolutely everything and the way he took it all by stride...

I cannot rec this book enough. All the yearning. All the feel good. All the sweetness and all the spice. Beautiful book.
Profile Image for JessB.
170 reviews1 follower
September 20, 2026
Swooon!

BFFs (especially since childhood) is one of my favorite tropes. The author definitely did it justice with Grayson and Harlow 🥹. I was hooked from the beginning.

I can't wait to get the full story of Harlow being left at the altar 👀. I already pre-ordered 😅.
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