Teaching Chloe - Cover

Teaching Chloe

Copyright© 2025 by Dashdoll

Chapter 1

Incest Sex Story: Chapter 1 - Busty step-sis sees him fap and is curious to see more...

Caution: This Incest Sex Story contains strong sexual content, including mt/ft   Teenagers   Consensual   Heterosexual   Fiction   Incest   Brother   Sister   Big Breasts   Size  

The house was quiet, and for a moment, Alex had his solitude. No more work, no more stress, at least for tonight. It was late, but his mom worked nights in the ICU, and Chloe’s car wasn’t in the driveway, probably meaning she was spending the night at a friend’s house. Alex was finally alone.

He was sprawled out on his bed, earbuds in, his laptop precariously balanced on his bare knees. His focus was on the screen where a repeating sex animation played out on a loop, from multiple angles. The featured girl displayed impossible proportions only a 3d anime-style model could possess, and Alex couldn’t get enough.

Her breasts bounced with surrealistic buoyancy, prompting an immediate surge in his groin. Alex’s breath quickened as he watched, one hand already tugging at his hardening penis, jeans around his ankles. He’d always had a thing for large breasts and a small waist. The way her huge tits bounced rapidly filled his balls with semen, and he could feel his impending orgasm building.Those huge tits!

“Alex-?”

Alex’s head snapped up. Panic! His heart was pounding, head snapping towards the intruder, eyes wide. He’d left his door open, of course, because he was home alone. Except he wasn’t.

His stepsister, Chloe, was standing in the doorway, her mouth open in shock.

Alex’s face was beet red, and he scrambled to pull up his pants, trying to cover himself. “Chloe, fuck, I ... I was just going over some ... uh...” The frantic effort to get his jeans on had flipped his laptop onto the floor facing Chloe, giving her full view of the huge-breasted girl on his screen.

Chloe’s gaze darted from the screen to Alex, her cheeks burning hot, unable to look away.

“Uh ... um...,” Alex continued, finally managing to get his jeans zipped. He stepped in front of his laptop on the floor, a poor attempt to cover the screen. “You ... weren’t supposed to see that! I ... I’m sorry.”

Chloe’s eyes returned to the busty woman onscreen, she’s putting his ... thing ... in her ... that’s a ... I’m seeing a blowjob. She knew the basics about this stuff, of course, but she’d never really gotten into it. It usually made her feel uncomfortable. But this felt different somehow...

Her cheeks still ablaze, her eyes went from the hard dick on the screen to the hard dick in Alex’s jeans. Alex attempted to close the laptop with his foot, but the effort only accentuated the huge bulge in his crotch.

Embarrassment warred with a strange thrill in Chloe’s belly as she stared at his hard-on. She’d never seen a guy get hard before. She’d stumbled into stuff online enough to know what it looked like, but this was ... this was real ... and this was her stepbrother.

“Fuck, Chloe, say something,” Alex pleaded, his voice a hoarse whisper.

“I ... I’m sorry ... Alex,” she mumbled, then she was gone.

Alex sat back on the bed, still in shock. Fuck! How much did she see? How was she even home!?

Not really relevant at the moment, Alex! What do we do?

Think. Just think.

As far as Alex knew, his stepsister, Chloe, wasn’t just a virgin, she’d never even mentioned sex. He’d always seen her as innocent, and a stab of guilt hit him, knowing he may have spoiled that.

Okay ... damage control. I mean ... fuck! I really hope she’s okay! I should go talk to her.


Chloe sat on her bed, staring at the wall, eyes wide. She couldn’t stop picturing it.

She’d just woken up from a nap, and was on her way to the bathroom, when she saw ... Alex. Her stepbrother. Naked from the waist down, his pants around his ankles, and his hand around his ... thing. She couldn’t believe it. She’d never seen one in real life before, and definitely not her brother’s. Well, her stepbrother’s.

She knew she should be freaking out, but somehow, the fact that it was Alex made this whole thing feel ... safe. Usually, in moments like this, like an explicit pop-up ad after clicking on the wrong link (Okay this isn’t quite the same, but still), her curiosity about sex stuff was overridden by discomfort, and seeing a dick usually felt aggressive, threatening even.

But this was Alex, and he’d been looking out for her for years. Even now, just remembering the times he’d been there for her put her at ease. She started to relax, and let herself think.

She pictured the incident again.

Mom’s car was in the shop, so she had taken Chloe’s car to work. Chloe crashed out early, and woke up to pee. She didn’t think much of seeing Alex on his laptop as she passed his room. The huge boobs on his screen didn’t even register at first.

It was his penis. His hard penis.

At first, the whole scene didn’t quite come together, and she stood watching, unseen and confused. After a few seconds, she recognized what was on his screen, and what was happening. But by then, before the discomfort could set in, she had felt something else. Something new. Something that was still itching her. That’s the only way she could describe it. An itch.

She thought of Alex’s hard penis again, the way he was looking at that girl on the screen, and the feeling grew stronger. She stood and looked at herself in the mirror. She tried mimicking a few sexy poses she’d seen on the screen. Not bad.

Curious, she pulled off her shirt, leaving just her sports bra. She cupped her breasts and smiled as she noted that her petite hands couldn’t come close to containing them. She’d never even told her friends this, because most of them were wearing bras they hoped would make their breasts look bigger, but Chloe wore a special compression bra to keep her breasts concealed. Attracting that kind of sexual attention from boys just felt, again, aggressive, threatening.

She pulled the sports bra over her head, her heavy breasts falling free with a perky bounce. She looked at herself from a few angles, and wondered if Alex had ever looked at her boobs the way he looked at the girl on that screen. Would her boobs make him hard like that? The thought of that look directed at her brought the itch back ... and the curiosity. In that moment, Chloe made a decision.

In the next moment, she saw Alex, slack-jawed and eyes wide, standing at her half-open door.


Alex approached Chloe’s room, having no idea what he was going to say, just wanting to make sure that she was alright.

Alex recalled the scene. Chloe’s short brown hair flopped down to one side, covering one green eye. She wore a midriff t-shirt and pajama bottoms, and she wore them well. She was short and petite, and Alex had always thought she was very cute.

Not that he’d ever looked that hard (okay maybe a few times), but Chloe truly had an incredible body. She was fit, but not too toned, a cute ass (okay yes, he’s looked), slim rounded hips and an even narrower waist. It was hard to quantify her breasts for some reason, she never wore anything too revealing, but regardless, they looked great on her small frame.

Alex stopped at Chloe’s half-open door. He couldn’t see her, well, not directly, but there was a full-length mirror. There he could see everything.

Chloe had removed her top, now just in her sports bra. Alex had never gotten this good of a look before. The bra held her breasts down, but there was only so much it could do. There was some definite mass being supported there. Alex felt his cock give an involuntary twitch.

Then, as if hearing his unspoken prayer, Chloe began to pull her bra off. Alex saw it all in slow-motion. The under-boob reveal, her breasts being lifted up by the sports bra, then spilling out, one at a time, each firm round tit bouncing with its own momentum. Had he thought they might be big? Compared to her tiny little waist, they were HUGE. Her light-colored areolas were a perfect proportion, small but a bit puffy, pointing slightly up. She was perfection.

She was also staring at him.

“Oh, shit! Chloe, I...”

“Alex! What the fuck!?”

Chloe’s hands instinctively flew to cover her breasts, and the quick motion made them bounce fetchingly. Alex turned away, half covering his eyes as if blinded.

“I’m sorry Chloe, I didn’t expect ... what are you doing?”

“I ... I’m in my room, I can do what I want!”

“No, I know, I ... I didn’t mean...”

Alex turned back to see Chloe had managed to find her top. He got an eyeful of side-boob as she pulled it over her head. She turned to face him, putting her hands on her hips. Even that small motion made her unrestrained tits sway gently for a moment. Jesus! What’s wrong with me? And how did I not notice those before!?

“I just meant ... why is your door open if...”

YOU of all people are asking me that!?”

Chloe gestured expectantly, brow furrowed, and again, her tits demonstrated their buoyancy. Alex couldn’t help dropping his gaze. Without a bra, not only were they free to bounce, but her short white t-shirt did little to hide the contours of her large, shapely breasts, and he thought he could even see the outline of her-

“Earth to Alex!!”

His gaze snapped back up to Chloe’s face, her cheeks flushed, green eyes flashing, demanding. Her arms were crossed protectively, but without her sports bra her arms practically displayed her large breasts on a shelf, pulling the material tight. He felt a jolt of guilt, but his body was still buzzing with arousal, betraying him.

“I’m sorry, Chloe. I didn’t mean to stare. I know it’s inappropriate ... but ... I mean, you ... you’re fucking beautiful, ” Alex admitted plainly.

Chloe’s breath hitched at his words, her anger melting away, replaced by a mix of confusion and arousal. She could see the truth in his eyes, and it sent a shiver down her spine.

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