Lady Tanja wanted to torture and humiliate this guy for masturbating too much. So she used a chastity device to have her way. The mistress forced the guy to wear the device and once he had worn it, she then teased him and flirted with him. In addition, she gave him jerk off instructions and he had a hard-on which hurt him as the device could not allow for expansion of his dick. He was in pain and he could not touch his dick.
Lady Tanja loves to humiliate gullible guys. She knows that they cannot do anything to her and she has fun at their expense. She got this loser to wear a chastity device after she had lied to him that she was interested in him and that she was going to fuck him thereafter. It did not happen and he had to endure the torture and humiliation of being made to wear a chastity device.