He reached over and pressed the emergency button. The elevator started to move.Janice sighed and dropped her skirt. "Damn," she said and looked at the...floor between her legs. There was a large blob of cum between her feet."Here," Tim said and handed her the thong panties from his pocket."Where did you get these?" Janice asked, taking the tiny piece of material and sopping up her sloppy vagina as best she could."Let's get some lunch and I'll tell you." He took the panties back when Janice was. Never had I considered my sister as a sexual being. I had always subconsciously wondered if she ever played with herself, and what she truly looked like without any clothes, but I didn’t really care since that was her business. But now that I had watched her cum, I couldn’t keep my mind off of her. When my time came to take a shower, I gathered my things and went across the hall to Mrs. Ford’s apartment. When I had dressed and returned to our apartment, Becca was gone. “Where’s Becca?” I asked. I could see my own reflection on the surface, my face similar to Keily's, though I lacked her freckles and had blue eyes instead of green. Then I realized I was naked, my breasts swaying as I shifted, dangling over the railing.I blushed in shock, making sure I was alone.I wasn't.A girl fluttered in the air, held aloft by gossamer wings. Her body was slim and petite, like Keily's, though the girl's skin was far paler, the hue of alabaster or ivory. Vibrant, green hair spilled about a doll-like. "Jessie, what the-holy hell!!!" Was all I could say because I had just walked in on my sister rubbing her pussy furiously on top of her blanket. Her shorts were at her knees (no panties), her shirt was pulled up to her collarbone, revealing those big, gorgeous tits! Her nipples were impossibly pink! She had two fingers in her pussy, and her other hand was a blur, rubbing her clit. She noticed me staring and shrieked as she tried to cover herself with a blanket. "Mattie!!! You didn't knock!".