When I get home from work, I smell cigarette smoke coming from my little stepsisters room and find her best friend River in a bikini on her bed. River is playing on her phone and smoking a cigarette. She tells me that my stepsister had given her a key to wait there for her to get home. Then I see the dildo she had next to her, and it all starts to be clear She asked me if I wanted to fuck her instead. River started to use her mouth on me to get me fully erect. We fucked in just about every imaginable position. She even let me fuck her ass and it was her first time doing anal. Her ass was so tight that it wasn’t very long until I blew a load of cum onto River’s sexy butt. River reached back with her fingers and scraped cum off her ass and started to suck my cum from her fingers.