When this guy was enjoying how mistress Nyx entertained him, it did not occur to him that she had a sinister motive behind what she was doing. He thought that she was into him but the truth is that she wanted to dominate him financially and she was able to do it with relative ease as he was gullible and he fell for her tricks. She then turned him into a human atm and he did not realize until a day later.
Mistress Nyx is the kind of person who loves to pay her bills with other people's money. She loves to save her money instead and she is planning to buy her house in cash. So her rent was due today and she felt this loser had to pay it for her. She teased him a little and made him jerk off to her instructions and that is how he paid her rent. He did not even get the cookie from her.