There is something very wrong with what's going on here. If feels like this guy is rubbing your nose in poop. What's worse is the fact that you are actually considering bowing to his demands! If you give in to his command, you will be setting up a precedent in this relationship that says that he can order you about and you will obey him. Is this the kind of relationship you want?
The fact that you are willing to do penance means that you are used to being put down. I have the idea that were raised by parents who controlled, bullied, pressured, punished and shamed you. In which case, such treatment would seem normal, which would explain why you would be willing to fall in line with this guy.
If he wants to tell you how he feels about your having slept with another guy, that 's fine. You can listen and understand his hurt or jealousy, but that 's all.