I'm cheating with a much older man
Why are you cheating with an old man?
I get so much money from him
If he were single than you can do whatever you want even if it is for his money, but you or him are already in a relationship and that's horrible. You are so money hungry you threw out your current relationships for this.
Yeah, I'm sick of this relationship, I'm doing him.
I think it's unacceptable to have an affair just because you want money from this man. You should at least come clean to your partner about this.