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Stepbrother's Obsession

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You're not supposed to want your step-brother...

But the second I saw Colt working on his motorcycle—shirtless and tatted up—my eighteen year old body betrayed me.

He's ten years older, all man, rough hands, dangerous eyes, and a body that makes me forget why this is forbidden.

He's been fighting his attraction, but when our parents leave us alone at the lake house for three weeks, the tension becomes unbearable.

We need to stay away, but every glance, every accidental touch only makes me want him more. The age-gap is hot, and I'm done being a good girl.

Colt says I don't know what I'm getting into, but it's time my step-brother learned it's the good girls who have the dirtiest dreams...

And by the end of the summer, I won't be his step-sister, I'll be his...

An addictive, over-the-top, instalove romance featuring a hot, possessive, rugged step-brother and an innocent, virgin step-sister who drives him crazy. No cliffhangers, no cheating, just pure obsession and a HEA that will leave you breathless!

88 pages, Kindle Edition

Published November 6, 2025

262 people are currently reading
36 people want to read

About the author

Jenna Rose

141 books760 followers

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5 stars
138 (31%)
4 stars
113 (25%)
3 stars
108 (24%)
2 stars
57 (13%)
1 star
20 (4%)
Displaying 1 - 23 of 23 reviews
Profile Image for Kimmylongtime.
1,338 reviews131 followers
November 16, 2025
Colt Colt he’s our man !!

We all need a Colt in our life right now !! There was something about the way he didn’t overpower Lily and let her run the show that made me respect his gangsta. There are so many passionate moments shared between these two mostly initiated by our home girl Lily who at 18 knew that she was ready to learn !! She was smooth without being obvious, and even when she didn’t feel so confident she launched for her man. There will be moments where people who aren’t super crazy about taboo will get caught off guard but come into this with an open mind and heart and fall for these two.
I cannot recommend this book enough but it’s our girl JR so you know it’s freaking awesome!! Happy reading everyone 😊🥰!
Profile Image for Paige.
754 reviews13 followers
December 6, 2025
2-2.5

Would have been better if the FMC didn’t constantly throw herself at the MMC. Even when he was being a complete asshole. And when he ended things she’s the one who ran and chased him. Like come on authors!! Do better with your female characters.

Also the step sibling thing was a stretch. Their parents are dating, possibly engaged and the two MCs didn’t meet until the first chapter. So the taboo aspect of the step siblings wasn’t even there. The only taboo thing was their age gap.

Also did this man have a job? He leaves the summer lake house and spends two weeks sleeping in his car eating canned beans…like bro you couldn’t go home? Do you even have a home? Idk it was weird for someone who supposedly a grown ass man.

Wasn’t a fan of the parents either.

Safe all the way, no others. Virgin FMC, age gap 18/28, pregnancy, HEA (married with a kid)
Profile Image for Erin Under_Covers_Smut_Lover.
375 reviews37 followers
December 28, 2025
Rating: ⭐️⭐️⭐️💫
Spice: 🌶🌶🌶.25

What a spicy short story about a sweet, innocent 18 year old girl moving into her mother's fiance's lake house for the summer. Meeting her soon to be stepbrother, and the moment their eyes connect...obsession!

Tropes:
🏍 Step-Siblings Romance
🏞 Age-Gap (10 years)
🏍 InstaLove
🏞 Off-Limits/Forbidden
🏍 Boy Obsessed
🏞 Breeding/Pregnancy
🏍 OTT J/P
🏞 Tattooed Bad Boy/Good Girl
🏍 Virgn/Innocent FMC

This is a short 10 chapter romance with an epilogue. The tension, angst and attraction between the two main characters were evident from the moment Lily locked eyes on her new, soon to be stepbrother, Colt, through the window of her mother's car.

At first Lily didn't know what these instant feelings were inside of her because the moment she got out of her mom's car, Colt acted as if he didn't even see her. Making her feel confused and stirring feelings inside of her that didn't make sense. How could she feel like this and he seems so unaffected.

Colt tried to fight this instant connection and just he felt the moment his eyes locked on hers. He had to stay away from her and not ruin his dad's new family by giving in to his lust and obsession to his new, soon to be stepsister.

He ignored her when she walked into the same room. He told her to stay away from him and his garage, the only place he feels is truly his, where he works on motorcycles. Lily is off-limits, and he needs to remember that.

Boy is it hard though for Colt when Lily basically throws herself at him every chance she gets. She knows he felt it too, she just needs him to confess it. She needs to know that she's not feeling all these things by herself.

Colt's dad, Jim, and Lily's mom, Katherine surprise them one day by telling them they are going on a cruise for 3 weeks, and they will be at the lake house alone. Jim tells Colt to watch out and protect Lily, when that's the last thing he needs to do.

Their parents can tell there is tension between the two of them. Colt has denied trying to get close to Lily and acts out with orders to keep her away from him. The parents think it's just because they need time to bond... if they only knew.

It didn't even take a week before the tension got so hot and heated that they eventually crashed together in lust and acting out. Colt can no longer stay away. His mind keeps wondering crazy possessive, and obsessive thoughts about Lily. Example: he can't stand thinking she may not be innocent like he thought. If another man has touched her he's going to go crazy of someone else being in what is his. And that was before he confessed how he felt.

The spice is hot and steamy. These two are explosive when they come together, and once they do, they can't stay away or off of each other. One the porch, in his truck or his bed. Lily is his and he's hers. They are together no matter what.

That is until their parents come home 2 weeks early. Things go off the handle and Colt thinks he's protecting her and doing the right thing by letting their parents throw him out. She deserves better than him, or so he likes to think. Only things don't go as planned, or maybe they do go as planned 😉 when she tracks him down 2 weeks later.

This book is a hot and steamy must-read if you love stepbrother romances. I'll definitely be checking out this authors other short stories!
Profile Image for Trixie.
5,204 reviews
November 8, 2025
This story really got me thinking about what happens because of their choices, but honestly, I don't see anything bad about their relationship, especially since they're not related by blood or raised together. I actually enjoyed the story and watching the main guy struggle with his thoughts. At first, I thought the girl was just messing around and trying to tempt him, and he was trying to act mature. He did give in eventually, but she turned out to be the better person. The most important thing is that they love each other a lot, and he turned out to be a caring, good dad.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.
3,211 reviews26 followers
November 8, 2025
I love love love forbidden stepbrother romance and Stepbrother's Obsession by Jenna Rose was not your usual story. Lily and Colt were both obsessed with each other but Lily is the one going after what she wants while Colt is trying to resist. Colt is older and he knows they should keep their distance. But when their parents leave on a last minute trip leaving them all alone, it becomes impossible to stay apart. Any Lily is not to give up until she gets her man. Great read.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.
1,091 reviews8 followers
November 8, 2025
Stepbrother romances are one of my many favorite tropes and this one is one of the best. It’s short but super steamy with a ten year age gap (love those too!) between an innocent eighteen year old girl and her new stepbrother-to-be when their parents leave them alone to go on a cruise.

Readers who like a lot of spice are sure to love this one but it’s not just about the spice, it’s also got a great storyline to go along with it—one I think you’ll love. 100% recommended. 4.5 stars.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.
230 reviews2 followers
November 9, 2025
Great book. Well written.
Step siblings are drawn to each other, and fight attraction while their parents are off on vacation.
There’s a 10 year age gap between them.
This was an interesting read. They fought their attraction, and tried to be mature about the situation, but love wins out.
I was surprised at the realistic reaction their parents had when they learned about the relationship.
They didn’t like it one bit.
Book really highlighted some angst and some pain.
It was a quick read, but Jenna Rose did an awesome job packing a lot of story into it.
Profile Image for RxReads.
367 reviews4 followers
November 13, 2025
This was exactly what I expect from a Jenna Rose novella, quick, over-the-top, and seriously hot. Colt is the kind of possessive, tatted-up alpha who sees what he wants and claims it, and I wasn’t mad about it. The age gap and forbidden vibes were strong, and the chemistry? Off the charts.

If you like fast-burn, no-drama reads where the guy is obsessed from the start and the ending is all HEA, this one checks every box. 💯.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.
11.6k reviews49 followers
November 14, 2025
The lake house

Stepbrother's Obsession is a quick and sizzling story with a bit of an age gap. Lily and Colt are step-siblings who did not grow up together when their parents married. She is eighteen and he is twenty-eight, so a bit of a gap and even more so because of her actual age. But just go with and you will have an entertaining and steamy hot story to dig into for a fast read.
Profile Image for Mindy Lopez.
2,314 reviews14 followers
November 14, 2025
This is an age gap, off limits romance between Lily and her stepbrother Colt. These likeable souls and the unique plot make for an enjoyable read. It is a sweet instalove story with drama and steam, sexual tension and chemistry, family dynamic, and twists and turns, plus appealing secondary characters. Entertaining.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.
Profile Image for Lisa Scriven .
185 reviews1 follower
December 17, 2025
Didn't like the mmc

Here is another story of a fmc having to chase down a mmc. He lied n broke his promise to her. He was mean in the beginning n snapped at her n she jus took it. Hate females who don't stick up for themselves... Anyway, he just leaves her when it gets tough n doesn't fight for her . My opinion he only gets bk with her bc she was pregnant. The mmc was too wishy-washy for me. He was not man enough for fmc. N the fmc was 18 . N I didn't like the parents.
Profile Image for Adrienne.
526 reviews1 follower
January 14, 2026
Not enough substance

This was too light on everything... story...spice...character development...background...scene building.... essentially everything. This was so lackluster and plain. For a longer novella these characters had no substance and I felt cheated in the end with the insta-love trope because there literally is no building connection on the initial "cupid's arrow" physical attraction... Just boring to me...
Profile Image for laura.lovesreading.
1,276 reviews6 followers
November 7, 2025
I love a forbidden, off limit story especially when it comes with tension, forced proximity, age gap and kinky fun - so this book was right up my alley.

The tension, the chemistry, the inner struggle keeps you glued to the pages and I couldn’t put it down.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.
2,314 reviews
November 10, 2025
He may be ten years older but there is something drawing Lily and Colt together from the moment they meet. With taboo and off-limits vibes, mine!, her almost stepbrother, virgin and more, this is a steamy quick read.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.
Profile Image for Becci Tyler.
195 reviews
November 17, 2025
I have read multiple books by Jenna Rose. She definitely does not disappoint when it comes to spice. I love a good book that gives me multiple of my favorite tropes.
Age Gap
Step brother
Instalove
Forbidden

I am not a big fan of the pregnancy trope but it helped make this story. If you want all these tropes and lots of spice this story is for you.
12.1k reviews75 followers
November 7, 2025
The author has given us a fast-paced story that pulls us into the lives of Colt and Lily. The heartwarming story keeps us turning the pages with obsession, connection, denial and steam.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.
Profile Image for LiLu.
4,433 reviews1 follower
November 14, 2025
Mutual Obsession ~

I really enjoyed reading this story. The want and need was thick, starting with denial, but, what’s meant to be will always be. However, there was the parent’s issues to deal with. Loved their epilogue.
2,787 reviews15 followers
December 30, 2025
intriguing

Colt & lily Story was an awesome short story. I enjoy this author quick reads. I can’t wait to read what next.
Profile Image for Angie.
349 reviews
November 22, 2025
*HEA
*Safe Read
*No OW/OM drama
*H-28, been with others but no details/ h-18, virgin.

The story had a great premise and I was excited to get reading. However, I was exhausted with all of the pushing away Colt did to Lily. I understand having a little bit, but it was the majority of the book. Then when the parents got back, he didn't fight for their love and ran away. Man up dude!!! My heart broke for Lily. After a 2 week separation I thought there should have been more groveling, but oh well.



I received a free copy of this book via Booksprout and am voluntarily leaving a review.
Profile Image for Ariday Books.
267 reviews24 followers
January 5, 2026
Tropes:
-romance prohibido
-hermanastros
-pregnancy trope
-proximidad forzada
-age gap

Book info:
-mmc posesivo
-mmc obsesionado

-no drama om (otra mujer)
-no drama oh (otro hombre)

-célibes? Ella es virgen/ él hace rollos de una noche antes de conocerla
-spicy 🌶️🌶️🌶️( no condon)

⚠️: breeding kink, daddy kink

-final feliz
Displaying 1 - 23 of 23 reviews

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