My name is Alex, and this story happened when I was eighteen years old. My older sister, Heather, was so fucking gorgeous and sexy. I know thinking of my own sister in that way is kind of twisted, but I can't help it. Nor can I help peeping on her.
The night before, I was watching her, like always. I saw her take off her shirt and her jeans fall to the floor. As I watched her, with her short, dark hair, voluptuous figure, and soft belly, my heart started pounding. My cock started to get hard, as Heather took her bra off, revealing those luscious titties of hers, with those big, brown nipples and areola. It reached full hardness when she took off her panties, showing off her shapely ass, and that beautiful natural bush of hers. As I stared, rubbing my throbbing cock through my pants, I thought about squeezing my sister's tits, and licking and sucking on her hard, brown nipples, and caressing those huge, pillowy ass-cheeks.
She then did something I'd never seen before. She sat on her bed, and spread her legs. I couldn't believe my eyes! I was given a perfect view of my sister's pussy! I then figured out what she was doing. She had these pads, like acne pads, or moist towelettes, but something else I guess related to feminine hygiene, and she started to wipe down her twat with them, including holding it open to get inside. At first, I was too shocked to react, but, after a moment or so, my brain clicked back on, and I started to imagine the pad she was using was my tongue. I was eating her out, burying my tongue inside her snatch, while she moaned gratefully. Suddenly, I guess she figured out I was looking at her, and yelled, "Alex, quit staring at my tits!" I ran back to my room, and stroked my cock, thinking about what I'd just seen.
The next day, it was hot, and we were sitting in the TV room, watching a movie, while our parents were at work. My sister was sitting on the couch, wearing a sort of camisole and jean shorts. She suddenly looked over at me.
"Hey, Alex?"
"Yeah?"
"Sit here, next to me. I, uh, want to talk to you about something." I went and sat on the couch with her.
"What is it?"
"I wanna talk about you peeping on me."