I have never gotten along with my sister Amy. We always seemed to be screaming at each other when we were kids, and when we grew up, and we started dating boys, it just got worse. Maybe it was a simple personality conflict at first - the way she acts, the way she talks, it drives me crazy sometimes - but after all the stolen boyfriends and all the humiliations, it became a nasty little war.
One of the problems is that we're both blonde and pretty and we can have any boy we want. I'm a year older, a little taller than her, smarter and more athletic; Amy might be a bit cuter than me, she has bigger breasts and a curvy figure, and she's shallow, spoiled, and slutty. We're both popular in school, although we never hang out together. Everybody knows we don't like each other. Rebecca and Amy, the fighting sisters. When we cross paths, something bad always happens.
One day a few months ago I thought I was alone in the house, but I heard something when I walked past my sister's room. I stopped and listened - she was fucking some boy. It was just like Amy to sneak a boy into her bedroom; I wished that Mom and Dad would catch her doing it, but they never did. I stood by her door for a while, thinking of ways to get her into trouble, but then I heard her moan a name. "Oh, Jack..."
Jack? My Jack? I had been dating Jack for three weeks. Rage swept over me. She was doing it again!
I threw open the door. Amy was on her hands and knees, Jack was fucking her from behind. He looked up, saw me, and said, "Oh shit, Rebecca." Amy opened her eyes and screamed at me, "Get out!" Jack stumbled off the bed and started pulling on his pants, mumbling, "Sorry, I'm sorry." Amy sat up on the bed, yelling, "You bitch! Get out of my room!" Jack looked like he wanted to crawl away and hide.
I was beyond anger. This was the final straw. The war had gone on long enough. It was going to end now.
When I moved away from the door Jack ran past me. Lucky for him. I heard a door slamming, then I saw Jack through the window, barefoot, half-dressed, walking across the front yard, scratching his head and looking confused.
Amy was gloating, sitting naked on the edge of her bed. "I didn't even have to try very hard," she sneered as I walked up to her. "I guess he couldn't get what he wanted from you."
"You stupid slut," I said, and slapped her face, fast and hard.
Usually we just yelled and screamed at each other. Sometimes we threw things. I couldn't remember the last time we had a physical fight; we haven't hit each other since we were kids. I'd gone over the edge. That's how angry I was.
Amy jumped off the bed, screaming. She grabbed my hair and pulled - it hurt like hell. I went for her hair, bunching it in my fist, making her squeal. With my other hand I tried to twist her fingers out of my hair, and she did the same. I don't know how long we struggled in this position, arms locked, snarling, cursing, faces inches from each other. She kept pushing against me, her bare breasts rubbing against mine. I could smell sex in the room, the smell was coming off her body. Maybe I went a little crazy. Maybe I was getting excited. Maybe. But she was the one who started the kiss. She was the one who stuck her tongue in my mouth.
It was a shock. One moment she was pulling my hair, the next her lips were melting against mine, and I was still angry with her, even as our tongues slid together. What the hell was going on? I had never kissed a girl before. Now I was kissing my sister. My sister! This was deeply, deeply perverted.
I had never been more excited in my life.
God, I think I was coming as we kissed, my knees were shaking, I couldn't get enough breath. I felt out of control, I couldn't believe what was happening. She pushed her hands up my shirt, I ran my hands over her body. A twisted desire was building inside me, it was unstoppable. I was frantic. I was out of my mind. I pushed her back onto the bed, she opened her legs, and I put my mouth to her pussy.