In order to play a prank on my beautiful but annoying sister, I put some aphrodisiac bath salts I bought at a suspicious store into her bath. As I was watching my sister bathe, I soon heard a strange voice coming from the bathroom... While I was feeling good about the success of my prank, my sister's masturbation became more and more intense, and finally, when she found me peeking, she rushed towards my dick! I had no time to refuse, and she sucked my dick and inserted it deep in the cowgirl position...! Starring three big-breasted sisters!