My parents aren't home today... I'm not a man to turn down my beloved girlfriend's invitation! I was so excited when I went to visit her, but it turned out to be her younger sister, Riri. This sister was a total slut! She seduced me, who was looking forward to having sex with her, and even though I pretended not to, she kept playing with my dick. I know I shouldn't... I have a girlfriend... but Riri's pussy feels so good!