Eagerly, I sneak into my friend's house, knowing his sister's alone. She greets me, surprised but pleased. Quickly, we're making out, her breath catching as my hands roam her curves. I spin her around, pushing her down onto the couch, her ass the perfect target. I slip my jeans off, my cock hard and ready. I slide in, her pussy tight and wet, and we start fucking, her moans filling the room as I pound her in the doggie style.