Tempted By My Sister's Boyfriend

Tempted By My Sister's Boyfriend

Chapters: 111
Updated: 17 May 2026
Author: Author Tory
4.6

Synopsis

I never meant to betray my sister. But from the moment Adrian's dark, smoldering gaze met mine, he became my secret addiction. His touch sets me on fire, his possessiveness borders on obsession. And despite him being my sister's boyfriend, I'm powerless to stop. Then there's Alexander. The charming guy I met on campus. He's everything Adrian isn't. He's sweet, kind, and safe. And he makes no secret of how much he wants me. With one boy, I'm breaking all the rules. With the other, I'm denying all my desires. But now I'm trapped between one love I can't have and one I can't resist.

Forbidden Love Slow-burn Love Love Triangle Unexpected Romance Secret Crush Love At First Sight

Tempted By My Sister's Boyfriend Free Chapters

Chapter 1 Sparking Old Interest | Tempted By My Sister's Boyfriend

“You’ve got to tell me, princess,” he whispered as he tugged on my hair just a tad to draw out a whine from my trembling lips. “Tell me you’re desperate enough to rut against my dick and cum in those panties.”

Whimpering slightly, I nodded and continued to rock my hips on his cock.

“I... I’m desperate. It feels so good. I don’t want to stop.” I moaned shakily.

His ragged breath warmed my trembling lips.

“I wanna come just like this, please... please.”

I pushed my hips to rut harder, to rock faster. Soft pants and whines spilled from my lips. My mind was hazy as I could only think of chasing that teasing orgasm that was seemingly out of reach.

“As much as I want to have my dick riding inside you right now, you sound so fucking hot to stop,” he said. “So, rub against me all you want, princess. Rub until that clit of yours is aching to cum.”

** ** ** ** ** ** ** ** **

How it all started...

My name is Kim. Well, it’s Kimberly, but I’ve always preferred to be called Kim. My Dad, Maxwell Ashford, is the CEO of Ashford Group, a large firm with boring business stuff, but it pays for all our expensive lifestyle. My mum, Vivienne Ashford, on the other hand, is the editor-in-chief for a world-famous fashion magazine, LUXÉ. I have just one sibling, and she’s the most beautiful and sweetest sister a girl could ask for. Her name is Genevieve, and she is twenty years old, just two years older than I am, but somehow, I still get treated like a baby.

Genevieve is an extrovert, your typical outgoing, bubbly social butterfly. She is the type of girl that don’t have to do too much to get the attention of others. In fact, I admire my sister and have always wished to be like her.

She has beautiful, healthy blonde hair. Tall, curvy, has the perfect body and skin. It’s no wonder that she got the attention of Adrian Thorne, a young, high-profile Formula One racer. Despite being from a wealthy family, Adrian has built a reputation for himself at twenty-two years of age.

I, on the other hand, am not as fabulous as she is. I am what you would refer to as a dork. Most of the time, people ask me if I’m adopted, cause there’s no way I’m an Ashford and I look the way I look. I am very introverted, really shy around guys, and that’s why I’m still a virgin and sexually deprived.

Just a few days ago, I secretly purchased some sex toys. A vibrator and a dildo I saw advertised online. But that’s not the only secret thing that happened. Lately, my sister has been sneaking her boyfriend into the house through my room. He waits inside my room while Genevieve goes to make sure the coast is clear before he follows her up to her room. I know you’re probably wondering why that is, well, my parents are very strict and there’s a no boys allowed rule that my sister and I are obligated to obey until we don’t live here anymore.

We live in a secluded area in Los Angeles, California. My room is downstairs with direct access to another entrance at the back. Adrian comes in from the back, gets into my room, and waits till Genevieve says it's good to come out, and while he’s inside my room, we hardly speak. It’s just greetings and nothing else.

Until one day.

One day that changed everything.

It had become a normal routine of Adrian storming inside my room with Genevieve pleading with me to let him stay for a while. But on that day, it was different. Genevieve usually knocks before anything, but this time, she didn’t.

Adrian came in by himself without knocking and caught me naked, lying on the bed with my legs spread open. A vibrator on my p*ssy, and my other hand gripping the sheets tightly as I moaned from the momentum of the vibrator on my cl*t.

The moment our eyes met, I squirted. It was impossible for me to control it as it was my first time ever pleasuring myself. I covered my mouth with one palm as I struggled to moan quietly, with the other hand pulling the blanket over my body.

My body trembled, both in pleasure and shame. Adrian had seen me touch myself; he must think I’m miserable, I thought. But I was wrong.

He liked it.

“My goodness... my goodness,” I said as I covered myself with a blanket.

“It’s okay,” he said as he bit his lower lip, his eyes never leaving my body.

“No, it’s not okay. You just saw me wet my bed. I’m so embarrassed,” I said as I lowered my head.

“It’s not your fault,” he said as he walked closer.

“Yes, you’re right. It’s not my fault. It’s yours,” I jumped off the bed, the blanket wrapped around my body, as I pulled the wet sheets off the bed. “You should have knocked, but for some reason you didn’t.”

“I’m sorry. It’s just that your house is packed, I didn’t want to risk making any sound.”

“Yeah. It’s my grandparents' wedding anniversary in two days, so the whole family is here.”

“No wonder Gen said it would take longer for her to come get me.”

“What do you guys even do that you have to be here... all the time?” I asked.

He laughed.

“You know what, forget I asked. I’m sure you’re up there being naughty.”

“Naughty? You mean, f*cking?”

I rolled my eyes at him as I went into the bathroom for a quick shower and then into my walk-in closet to pick out some fresh clothes.

“Yeah, I’m not supposed to speak about any of that, but to ease your curiosity because I know you’re probably thinking about that now,” he chuckled. “Yeah, you could say we do it.”

“That’s both your business. I don’t really care much about s*x.” I walked back into my room, cleaned and dressed up.

“If you don’t care about it, why do you have these sex toys lying around?” he smirked.

I hurriedly picked up the toys and threw them in a cabinet in my walk-in closet. “Oh, my goodness! Take your eyes off that.”

“It’s not a bad thing, Kim. You don’t have to be ashamed of it,” he said as he sat on the chaise lounge. “Besides, you probably do it with your boyfriend, so what’s new?”

“I don’t have a boyfriend.”

“I don’t believe it. You’re a very beautiful girl, and I’m sure there are a lot of guys who want to date you.”

“And yet, here I am. Still very single and alone.”

Adrian’s expression changed. It was as if he were sad, or maybe he pitied me. I don’t know what it was, but whatever it was, it made him leave the lounge chair to come sit closer to me.

“That doesn’t mean you’re not beautiful. You are the most beautiful girl I have ever had the opportunity to meet,” he smiled.

“You’re probably mistaken me for Gen, but thank you. That’s very sweet of you to say.”

He paused for a while as he stared deep into my eyes.

“Most times, I wish it was you instead.”

“What do you—”

A knock came, interrupting me mid-sentence.

“Come in, Gen,” I answered.

Genevieve rushed in, ran up to Adrian, and jumped into his arms.

“Let’s go,” she smiled. “Thanks, baby sis.”

I sat on my bed watching them leave as I thought about what Adrian meant by ‘most times, I wished it was you instead.’

And since that day, nothing has ever been the same.

Chapter 2 Third-wheeling | Tempted By My Sister's Boyfriend

My relationship with Gen hasn’t been one deemed sister goal-worthy. I mean, on the internet, we look like we have the best relationship, but things are not what they look like. Gen has been nothing but nice to me, but I have always been excluded from her social life. So, when she asked me if I was interested in going to see a movie with her and Adrian, I was genuinely amazed.

But of course, I said yes.

“Well, okay. Get ready, we’ll be leaving in a few minutes. Adrian will meet us at the cinema,” Gen smiled.

“Thanks, Gen,” I said, hugging her.

“Save it for Adrian,” she said.

“What do you mean?” I asked.

“He was the one who requested you join us, and he sent me to ask if you would be interested in coming with us,” she answered.

And of course. It wasn’t Gen’s idea, but it was nice to be included.

“I guess I’ll thank him when I see him then,” I said as I turned to get changed.

“Oh!” she exclaimed. “Please, look good.”

I nodded but didn’t say anything. I knew I wasn’t going to be able to come with her if I looked weird. I got dressed in a simple floral dress. Hopefully, Gen approves. We got out and parked at the front gate, was Gen’s Aston Martin DB11 Volante.

“Do you have your license for this thing?” I asked, grinning as she started the engine with a low purr.

She smirked. “You don’t ask a goddess how she flies.”

The car eased out of the gate with grace as we hit the Pacific Coast Highway. Twenty minutes later, the DB11 glided into the underground parking garage of the Crescent Cinema, a boutique movie house in West Hollywood known for its velvet recliners and vintage champagne at the concession stand.

Genevieve parked without a word, stepped out, and handed her key to the valet with a wink.

“Don’t scratch it,” she said, tossing a smile over her shoulder.

The valet swallowed hard, already blushing. “Y-Yes, Miss Ashford.”

As we walked through the lobby, moviegoers glanced up. A few whispers, a few not-so-subtle phone cameras. The Ashford sisters were impossible to ignore.

I leaned closer. “Are you sure he’s even here yet?”

But Gen didn’t answer; she probably thought she didn’t have to. As we turned the corner and walked into the private screening lounge, Adrian was already waiting there.

He stood near the wall-length glass window, arms crossed, dressed in charcoal gray sweatpants with a crisp white tee underneath a black sweatshirt and paired with white sneakers. His bright brown eyes flickered towards me and paused on Gen.

“You’re late,” he said, smirking.

Gen arched a brow. “You’re early, and underdressed.”

“Didn’t realize this was a fashion show,” he said as he stepped forward and kissed Gen on the cheeks.

“Thank you, Adrian, for inviting me along,” I smiled.

“Glad you accepted.”

In just one snap, Gen pulled him closer to her. I turned away, pretending to study the vintage film posters. I didn't want to see how my sister softened under his touch, or how easily he made it look like she was the only one that mattered.

I faked a cough. “Okay, we get it. You’re in love. Can we watch the movie now?”

Adrian chuckled. “Sure... The movie.”

Adrian and Gen walked up to the back as they sat comfortably, while I sat at the front.

“Hey, Kim,” Adrian called.

I turned. “Yeah, what’s up?”

“Why are you sitting there? Come sit here,” he demanded.

“I felt you lovebirds will need the space,” I chuckled.

“Watching will be better from here, so come up. Sit with us,” he said.

“Gen? Is that okay with you?” I asked.

“Yeah, whatever,” she answered.

I walked up to them. Gen sat at his right-hand side while I sat at the left, with him sitting in the middle. I looked over to them, and Gen had already wrapped herself in his arms.

A few minutes into the movie, I felt a touch. It was so soft and gentle that it made me quiver. I looked down at my thigh, and Adrian’s hand was resting there, with his fingers tracing my skin.

I remained silent as I glanced up at him, and our eyes met. He had a soft smile on his face as he turned back to watch the movie. I removed his hand from my thighs as I returned to the movie, but I couldn’t ignore how his touch made me feel, and how I wanted him to do it again.

Moments later, the movie ended. I rushed out of the lounge, not because I was in a hurry to get home but because Gen was locking lips with Adrian. A few minutes later, they walked out holding hands.

“Wow, Gen. You never cared to give me a heads up before you do the nasty,” I frowned.

“You’re just p*ss*d because you don’t have a boyfriend,” she said.

Just then, her phone began to ring. She pulled her phone out from her purse as she notified I and Adrian that she would be right back, leaving us alone once again.

Adrian turned towards me as he gently pulled me back into the private screening lounge.

“How was the movie?” he asked.

“It was fun until you and my sister had to ruin it with your kiss. Like, don’t you guys ever chill?” I shrugged.

Adrian laughed. “I see. The problem is the kiss, right?”

“Duh!”

“Did I mention you look really beautiful in your dress?”

“Aww. You think so?”

“Kim,” he grabs me gently just above my elbow. “You are beautiful.”

“Thank you,” I said, trying to hold back my smile.

We both stood there, alone in the lounge, our eyes never leaving each other's. He smirked as he grabbed my waist and pulled me closer to him, his hands tracing the curves of my body.

“How do you feel about me holding you like this?” he whispered into my ear.

I swallowed hard as I tried to control my body from trembling at the sound of his soft voice.

“Can you be honest with me?” he asked.

“What do you want to know?”

“Do you want me to stop?”

“I... I don’t know what to say. You’re my sister’s boyfriend.”

“Do you want me to stop?”

“Adrian—”

“Just answer the question, Kim. Do you want me to stop?”

I looked around, my body still trembling from being so close to him. “It’s weird, but I don’t want you to stop.”

He grinned as he patted me on my head, his hands now inside his pockets as he walked out of the lounge. I fell on the recliner seat, trying to control my breathing. Adrian is the first guy who’s ever been this close to me and the first guy to ever touch me intimately.

I knew it was wrong, but God, did I love every bit of it. Since the first day I saw Adrian Thorne in person, I’ve developed a crush on him. I yearned for his attention, but my sister got it first, and without stress. They ended up dating, and the only time I saw Adrian was when he would hide inside my room till Gen came.

I always fantasized about him being with me instead and doing the things he does with my sister with me.

The first day I decided to try out the vibrator I bought, I visualized myself with Adrian, and as if it was fate, he came into my room. Now I can’t stop thinking about him.

There was something in the way he looked at me sometimes. The way my heart thudded sometimes when he looked at me, or how warm his voice felt in the space between my ribs. But he’s not mine.

“Kim!” Gen called out, snapping me away from my thoughts. “What are you still doing in here? Let’s go.”

“Yes, Gen.”