I still carry guilt for cheating on my wife and that is a problem I have not overcome.
I would be absolutely blown away if she hasn't also cheated on you.
Almost everyone does, but for obvious reasons nobody talks about it.
I'm not saying it's right or wrong, but from previous work I came to the conclusion that it's always going on.
You can't really justify guilt when 99.99% of other people are also doing it (to varying degrees)