While my wife was out, her younger sister came over to play and was sprawled out sleeping with her thong digging into her plump ass. It was driving me wild! Enchanted by her young body, I kept stealing glances, but she caught me. The little devil of a sister said, 'I'll keep it a secret from my sister, so let's have sex,' and pressed her body against mine! We had sex all over the place, and I even came inside her!
