Step sister becomes a naughty patient in therapist's office

Step-sis has always been a little strange, but I never thought she was weird enough to need a therapist. When she suddenly started going to one, it only made me more curious. So, when she asked me to join her in the therapist's office, I couldn't resist. As soon as we got there, she started acting crazy, stripping down to her underwear and making wild demands. I was taken aback at first, but then I realized this was exactly what she needed. We got down to business, and soon enough, my cock was buried deep inside her. The sight of her tits bouncing up and down only made things worse. But that's not all we had planned. It turns out her therapist is into naughty stuff too, and after a quick change of clothes, he joined in. Now, this is one patient who definitely knows how to get what she wants.