Afraid I'll have to disagree with you here.

It's not mow much the person loves you that is going to make the person change his or her opinion. Those kind of things can come and pass. It's his or her belief that matters. If he doesn't see anything wrog with cheating on someone, you have no garantee that he wouldn't do it again. On the other hand, if the person has a change of opinion and decides that cheating isn't the way to go, then he's much less likely to cheat if at all.

So as others have said, it really depends on the person.