I satisfied my step-sister's intense sexual desire by having intimate relations with her

A couple of days ago, after a long and hard day at work, my step-sister decided to have a nice time with her boyfriend. At that moment, I was sitting in the room and we began to talk about what we were going to do next. She suddenly began to show a very strong sexual desire, and then we began to make love. At first, I was a little surprised, because this is a strict taboo, but then I decided to satisfy her, because she was very much in need. We started to have sex, and she began to ride me, showing all her skills. She is a real whore who loves to have sex with different guys, and this time she managed to satisfy herself.