People change. Sometimes people that would never have cheated end up changing and become people that would cheat.
Sometimes people who would have cheated, who did cheat, turn into the most loyal people.
I think the argument of "Once an [x], always an [x]" is rather flawed in general. Some alcoholics get over it 100%, some addicts get over it 100%, some people that cheat get over it, too.
I also think, though, that not even offering a chance of forgiveness is a terrible thing. What sort of ivory tower do people place their partners in?
Yes, it hurts as hell when you get cheated on, but we're humans. We *** up, and you know what, we *** up
a lot. I'm not saying it's okay to cheat, but what I am saying is that everyone deserves a chance to redeem themselves.
People change. Sometimes for the better.
If we never give them a chance, how can we ever view them as the bad party involved?