I was sitting on the edge of the bed with my shorts around my ankles, a pair of scissors in my hand and a page printed from the Gillette website explaining how to trim my pubic hair beside me when my stepsister’s voice exclaimed “What the hell are you doing, Tim?”
I jumped and almost cut into the side of my cock.
Ali stood leaning in the doorway with her arms crossed under her boobs. I had thought I was alone. It was Sunday afternoon, the day my parents always went to the store for the week’s groceries. I could usually rely on three hours to myself. Ali should be out with her friends, and I had assumed there was no one home but me.
I could feel my face flushing. “Um…” I said.
“Well?” Ali said.
“I was… going to trim my bush.” I admitted.
“Well… it’s meant to make it look bigger.”
“Make what look bigger?”
“You know,” I said.
“My cock,” I said.
“Really?” She looked down at me and laughed, “That would be one hell of trick!”
I was insulted now. “It’s not that small, Ali,” I protested.
“It doesn’t look very big to me,” she said.
“And you know all about cocks, I suppose. Besides, it gets bigger. And you gave me a shock - that’s going to make it shrink too.”
“Huh,” she snorted.
Ali and I were stepsiblings who had turned eighteen this summer -- and very much alike. I was near six feet with dark curly hair. Ali was five feet four with curly blonde locks that fell to her chin, framing her face. She was my stepsister, so I probably wasn’t too good a judge of how hot she was, but if I tried to look at her as just another girl then she was hot. Slim, good legs, nicely toned butt that filled her jeans perfectly, flat stomach and sexy boobs. I had sneaked a look at one of her bras a while back and knew she took a 34B size.
Usually we got on very well together - but maybe not today.
I imagine, like all stepbrothers, I’d had those thoughts about Ali. Most of the guys I hung out with who had stepsisters said they’d had them, and Toby Black told us he’d seen his stepsister masturbating when he peeked into her bedroom one night and it had really turned him on. But it had never occurred to me that I might ever do anything with Ali. My secret thoughts were pleasant fantasies, but that was strictly where they belonged, in the closet marked: “Nice to think about, but no way!”