Lusty Sibling Summer

It was summer break, and I’d just come home from college. My nineteen-year-old sister, Vivi, was there too, but our parents were both working.

I was only half conscious when my door slammed open and Vivi rocketed onto my mattress, shrieking, “Surprise hug!”

For fuck’s sake—she landed directly on top of me, her arms shooting around my neck.

“It’s so nice having you here!” She mashed her face into my shoulder—which would have been cute if she didn’t have me in a sleeper hold and I wasn’t sporting the moon landing under the covers.

This became a more pressing issue when I realized two things:

(a) Vivi wore a short purple nightie, and

(b) it was currently doing the pogo on my boner.

“Air…need air,” I said, which only encouraged her to squeeze harder.

Her boobs, which had recently turned into natural Ds, squished against my chest.

“Oh my God, such a baby,” she giggled, easing up to allow me a breath.

She pecked me on the cheek, then sat back on her haunches. Her nightie bunched up on her thighs, showing off more smooth, pale flesh. She caught me staring and grinned, then jabbed a finger in my ribs.

“You’re up, mission accomplished. Did you want to play Smash before or after breakfast?”

I forced my eyes nto her face, giant blue anime eyes behind round glasses, just like I remembered, but the rest of her had changed at warp speed. She’d grown in the two years I’d been away at college. Vivi had gone from an awkward teenager…to…well…a young woman.

The purple nightie clung to a body that had definitely not been present before. Her waist sucked in dramatically before swerving out into hips that cycled under the thin cotton as she bounced gleefully on my mattress. Followed by her breasts. She’d always been dorky-cute, but now I found her sexy.

“After I put on pants, maybe.”

She pretended to consider and shrugged. “You do you, Chase. If you want to play commando for old time’s sake, it’s your house.”

“Vivi.” I gave her a warning look.

She giggled again, rolling off the mattress. “No judgment. I watched this TED talk on nudist colonies last week, and honestly, I think it’s less disgusting than people think. Less laundry. Less shame.”

I grabbed the nearest pillow, covering myself. “And more police when the neighbors call.”

Vivi went to my closet, not even pretending to touch her knobby knees together for modesty. The hem of her nightie put her ass on display. She bent over, fishing among my old college t-shirts, and the nightie shot up to her cheeks. Was she going commando? I wasn’t sure if I wanted to know, but I couldn’t see any underwear, either. Just firm buttocks stretching the cotton.

“Vivi,” I said. “Not cool.”

“Chill. You’ve seen my butt a million times. Statistically, you have to be immune to it.”

“I hope you’re wearing panties at least.”

“Hmmm, let me check.” She lifted the hem of her nightie, revealing Hello Kitty panties. “Yup. This time, I remembered.”

I rolled my eyes. After collecting a wad of clothes, she turned and threw them at me. “See you downstairs!”

She winked and was gone, leaving me to wrestle with my sheets, my pride, and the crisis in my boxers.

I got dressed to mask my condition. I found my s