As I tried to suppress my pounding heartbeat and peeked at her panties, for some reason, the older sister's legs began to spread. Even though she must have known that I was trying to look... She provocatively struck a bold pose and showed off her panties. Excited, my dick became rock hard, and as I imagined what was inside her panties and kept peeking, the older sister straddled me and started rubbing her pussy against my pants…
