Chapter 1: Housesitters

Finals week had kicked my ass. Three papers, two exams, and a group project with people who’d ghosted until the last minute meant I’d barely slept in two weeks. I’d been so buried in schoolwork that I’d barely talked to my family — just quick texts to Mom confirming I was alive and would be home “sometime soon.”

It wasn’t a big deal that things were ambiguous. The house was empty. My parents were on some cruise they’d gotten through Dad’s union — two weeks in the Caribbean. My older sister Jessica was married and getting deep into her career. My younger sister Emma was away at some theater camp. Which meant I’d have the house completely to myself for the first time ever.

I had plans. Big plans. Sleep until noon. Eat cereal for dinner. Dance around in my boxer shorts and sunglasses. Maybe finally finish that video game I’d started at Christmas. Heaven.

The drive home from college was six hours, but I’d left early enough that I was making good time. Windows down, music loud, warm June air whipping through the car. I felt lighter with every mile, the stress of finals melting away. By the time I pulled into my neighborhood, I was practically grinning.

Our house was a modest two-story in a working-class neighborhood — nothing fancy, but solid. Dad had worked at the factory for twenty-five years. Mom was a principal at the middle school. We weren’t rich, but we were comfortable.

I pulled into the driveway expecting darkness and silence. Instead, I saw lights on upstairs and heard music — something pop and upbeat — floating through an open window.

“What the hell?” I muttered, grabbing my duffel bag and heading to the door.

I pushed it open and called out, “Hello?”

Immediate footsteps thundered down the stairs, and then Mia appeared on the landing, and my brain did this weird stutter-stop thing.

Mia was my niece — my older brother David’s oldest daughter. She’d just turned seventeen a few months ago, just completing junior year in high school. I’d seen her at Christmas, but something had changed since then. Or maybe I just hadn’t been paying attention before.

She was gorgeous.

Mia had inherited her mom’s Latin features mixed with my brother’s white genetics — the result was striking. Her face was heart-shaped with high cheekbones, a small nose, and full lips that were naturally pink. Her eyes were almond-shaped, dark brown and expressive, currently lit up with surprise and excitement. Her wavy black hair was pulled back in a ponytail, hipster bangs framing her brow, catching the light as she bounded down the stairs.

But it was what she was wearing that made my mouth go dry.

A thin white tank top that was clearly meant to be worn with a bra. She wasn’t wearing one. Her breasts were small — maybe A-cups — but perky and firm, and I could see everything through the fabric. The outline of her nipples, small and dark, pressed against the material. The gentle swell of her breasts moved as she came down the stairs.

Below that, she wore the tiniest boy-short panties — pale pink — that hugged her ass and rode low on her hips. Her legs were long and toned, smooth and tan. The panties were cut high enough that I could see the curve where her ass met her thighs.

“Ethan!” She bounced down the last few steps, her breasts jiggling with the movement, and I actively forced my eyes up to her face. “We didn’t know you were coming home today!”

“I, uh...” My brain was malfunctioning. “Mom said the house would be empty?”

“Housesitting!” Another voice from upstairs, and then Lily appeared at the top of the stairs.

Lily was Mia’s younger sister — fifteen, a sophomore. She’d always been the more outgoing one, loud and funny and constantly getting in trouble for her mouth.

She’d also blossomed into quite a young woman since I’d seen her last.

Lily had the same mixed features as her sister but with a rounder face — more cherubic, with full cheeks and a wider smile. Her eyes were bigger, more mischievous. Her hair was brownish but shorter, messier in a way that framed her face perfectly.

Her body was more developed than Mia’s. She wore a sports bra that showed off curves her sister didn’t have — definite B-cups, pushed up and together by the tight fabric. Her stomach was flat and toned. She wore tiny sleep shorts — gray cotton — that barely covered her ass. They rode up as she came down the stairs, showing off the new curves of soft-looking thighs.

“Gramps and grandma asked us to water plants and stuff,” Lily explained, coming to stand beside her sister. “Make sure the house didn’t burn down while they were gone.”

Both of them standing there in minimal clothing, looking at me with bright eyes and easy smiles. I was very aware that I was their uncle, even though I was only nineteen — just two years older than Mia, four years older than Lily. My brother David had started young.

“Right,” I managed. “That’s ... that makes sense. I just didn’t know. I told Mom my schedule was up in the air.”

“Well, surprise!” Lily said with a grin. “You’ve got roommates.”

“There’s like four bedrooms,” I said. “I’m sure we’ll manage.”

“We figured you might be coming home, so we already put fresh sheets on your bed,” Mia said, and there was something in her voice — something lower, softer. “Figured you’d be tired from the drive.”

“Thanks. That’s really thoughtful.” I shifted my duffel bag, very aware of how close they were standing. How much skin was visible. How the air conditioning was making their nipples hard through their thin tops.

Stop it, I told myself. They’re your nieces.

“You hungry?” Lily asked. “We were about to order pizza.”

“Pizza sounds amazing, actually.”

“Cool!” Lily grabbed my arm, and I felt the softness of her breast press against me. “Come on, we’ll figure out toppings. Mia always wants boring shit.”

“Pepperoni is not boring,” Mia protested, following us toward the kitchen. “It’s classic.”

“It’s basic,” Lily shot back.

I let them pull me along, grateful for the familiar rhythm of their bickering. It felt normal, safe. Not like whatever weird tension I’d felt in the entryway.

I begged for a shower to wash off the car sweat and we settled in the living room with pizza and drinks, sprawled on the couch watching some reality show they insisted was “so bad it’s good.” They weren’t wrong — it was trash, but their running commentary made it hilarious.

“Oh my GOD,” Lily said, pointing at the screen. “Did he seriously just say that? That’s the dumbest thing I’ve ever heard.”

“Right?” Mia laughed. “What a dumbass, guy is thirsty as hell but has no idea where to point that dick.”

I found myself relaxing, laughing along with them. The initial weirdness faded. They were just Mia and Lily, same as always. Funny, sharp, easy to be around.

Except.

Except Mia kept shifting closer on the couch. Nothing obvious, just gradual movements until her thigh was pressed against mine, warm and soft.

Except Lily kept stretching in ways that made her sports bra ride up, showing her flat stomach, the curve of her ribs.

Except both of them kept looking at me with these little glances — quick, assessing, like they were checking something. I was perpetually on the edge of suspicion that I was being flirted with. I don’t know if I was liking it or not, I didn’t want to piss off their dad if I mismanaged some teenage crushes.

“So how was freshman year?” Mia asked during a commercial break. “You hook up with anyone?”

The question was casual, but there was something underneath it.

“Uh, a bit,” I said. “Nothing serious. Just ... you know. College stuff.”

“College stuff,” Lily repeated with a grin. “Is that code for drunk hookups?”

“Maybe.”

“Any of them good?” Mia asked, and her hand landed on my thigh. Just resting there, casual and light.

“Some were okay,” I said, very aware of her touch.

“Just okay?” Lily leaned forward, and I could see straight down her sports bra to the swell of her breasts. “That’s disappointing. College boys should know what they’re doing.”

“Most of us don’t, seriously,” I admitted. “We’re like that clueless rube from the show.”

“What about you?” Mia asked, her fingers moving slightly on my thigh — not quite stroking, but definitely moving. “Do you know what you’re doing?”

My heart rate picked up. “I’d like to think so.”

“Prove it,” Lily said, and there was a challenge in her voice.

I looked between them — both watching me with dark eyes, lips slightly parted. The air in the room felt thick suddenly, charged.

“Prove it how?” I asked carefully.

“Kiss me,” Mia said simply. Her hand slid higher on my thigh. “Show me if college taught you anything.”

This was wrong. This was definitely wrong. They were my nieces. I should get up, make an excuse, go to my room.

But, uh ... goddamn. Mia was hot as fuck. And, uh ... Lily? Here as well? Not freaking out or throwing a pillow at her sister jealously?

Mia met me halfway, her lips soft and eager against mine. She tasted like pizza and cherry chapstick. Her hand went to the back of my neck, pulling me closer, and her tongue teased against my lips until I opened for her.

We kissed deeper, and I felt her small breast press against my chest as she shifted closer. My hand went to her waist automatically — skin warm and smooth under my palm.

When we broke apart, we were both breathing harder.

“Not bad,” Mia said, her voice breathy. “Lily’s turn.”

Before I could process that, Lily was there, straddling my lap, her hands on my shoulders. She kissed me harder than Mia had — more aggressive, more demanding. Her tongue pushed into my mouth, and I tasted her — sweet and warm. Her fuller breasts pressed against my chest, and I felt hard nipples through the thin sports bra.

She ground down on my lap slightly, and I felt my cock starting to harden in my shorts.

“Yeah,” Lily breathed when she pulled back. “He’s definitely done some kissing before.”

“This is insane,” I said, but my hands were on her hips, holding her in place.

“Why?” Mia asked. She’d moved closer, her hand now high on my thigh, fingers brushing against the growing bulge in my shorts. “Because we’re related?”

“Yeah, that’s a pretty big fucking reason.”

“Or,” Lily said, grinding down again, “We could just not give a shit about any of that?”

“Tell that to your Dad?” But my voice lacked conviction, especially with Lily’s ass pressing against my now fully hard cock.

“Don’t worry about our Dad,” Mia reassured. Her fingers traced the outline of my erection through my shorts. “Just show us what you got.”

Lily climbed off my lap and stood in front of me. Slowly, deliberately, she pulled her sports bra over her head.

Her breasts were perfect. Full A-cups, maybe almost B, sitting high and firm on her chest. Her nipples were pink and small, already hard and pointing slightly upward. The areolas were darker pink, about the size of quarters. Her breasts had that perfect high teenage shape — round and firm, sloping gently up to perfect nipples.