Mistress Morrigan felt that she was owed answers by this guy and she had to make sure that she got all of them before she was done with him. She did not beg him to do it as she knew that the best thing to do to him was to humiliate him so that he knew she did not come to play and that he had to do what she wanted.
With her chastity key, mistress Morrigan was able to control this guy. She did not care what he felt. All she did was to have him wear a chastity device which she lied to him would stiffen his dick and he would fuck her hard and give her crazy orgasms. He agreed. But instead of that, it gave her control over him as she hid the keys to the device.
While other mistresses use the chastity key to dominate and control their men, mistress Morrigan uses it to have fun with him. They both love delayed released and that is why she used the chastity key on him. He loved how she teased him and had him beg to be released and then given the cookie. She was also turned on seeing his desire for her and they made passionate love afterwards.