My slutty sister

My 18-year-old sister Lilly did whatever she wanted since she came of age. Walking around the house provocatively in just panties and a thin tank top, and I knew it wasn’t by accident. She was showing off her sexy body. For me. And for our father. We both wanted her, but we always tried to keep ourselves in check.
That evening, though, she went further. She lured me into the kitchen, and before I could pull myself together, she was kneeling before me, and I stopped holding back. She wanted me. She wanted to taste me. And I gave her everything.

Tags - Incest (Brother/Sister), Incest (Father/Daughter - Voyeurism/Cuckolding), Exhibitionism / Voyeurism, Seduction, Oral Sex / Blowjob, Creampie (Oral), Cum Swallowing

Words - 4202

Story sample - 

The air in the living room was thick and sticky, saturated with the smell of summer evening sweat and the quiet hum of the old fan that just pushed the warm air from one corner to another. Some stupid action movie was running on the screen, but neither of us was really paying attention to it. Dad sat next to me on the sagging couch, clutching a beer bottle and pretending to be interested in the explosions and gunfire. I was pretending, too. But both of us had our eyes fixed on the spectacle unfolding in the kitchen.

My sister, Lilly. Ever since she'd turned eighteen, it was like a switch had flipped in her. She became the lady of the house, the queen of this small kingdom. And she knew it.

She moved around the kitchen counter in nothing but white panties that dug into her round ass, and a thin, see-through tank top with no bra. When she stretched to get something from a shelf, the top tightened and I could clearly see the outline of her hard nipples. She was just making a sandwich, but she was putting on a show like a stripper in a private performance. And we were her only audience.

Dad cleared his throat and shook his head, his lips pressed into a thin line. He pretended to disapprove of this theater. But his gaze always returned to her long legs and the way her hips swayed with every movement. I saw it. I saw the hardening cock forming a bulge in the crotch of his loose shorts. He wasn't the only one. It was getting tight in my boxers, too. I wanted her. I wanted her so badly it hurt. I envied dad for sitting a little closer and having a better view.

Lilly turned to us, licking mayonnaise off her finger, and her eyes met mine. That little, devilish smile played on her lips. She knew exactly what she was doing to us. And I had a feeling that this evening wasn't going to end with just watching. I could feel it in the air, in the tension that you could cut with a knife.

"You boys want something too?" she asked, running her tongue over her lips as if savoring every word. "I've got enough here for everyone." Her gaze flew from dad to me and back again, and her bold, provocative smile deepened even more.

Dad just grunted something unintelligible into his beer bottle and quickly looked back at the TV, as if he was genuinely interested in the exploding helicopter. But I saw his hand trembling and a vein pulsing on his temple. His thoughts were almost tangible, full of desperation and suppressed lust.

But I kept staring at her. I couldn't tear my eyes away. I nodded, my throat tight, so only a hoarse sound came out.

"Yeah," I finally managed to get out. "I'd have some."