Nasty threesome fucking. A married couple Kate and Andrew has come to Doc on their friend's advice. They've stumbled upon a big problem - Kate couldn't reach orgasm during sex. This fact disturbed both of them. Kate was very confused, and even wanted to leave, but Doc has assured the couple, that this problem is very frequent and that he could help them. He proposed to go on with the session and he guaranteed that Kate will be satisfied. Doc has started...