When mistress Mayhem's boss thought that he could abuse his position to sleep with her, he was given a rude awakening as he found out that she was not as innocent as she looked. This is because she turned him into a cash slave with her findom fetish. He was given a taste of paygasm and while he had fun with her, he did not like the dent she left in his pocket.
Mistress Mayhem wanted to financially dominate her husband and she did it because she knew he was a sort of miser. He was a cheapskate and she wanted to spoil herself a little bit. So she waited until he had pissed her off and she used that as an excuse to punish him and to financially dominate him. He was so pissed himself that he had to spend a lot of money.