The thing is that you have to know the person you vow to spend the rest of your life with.
I am not so rigid where I can not forgive a mistake.
The case being if it is a full blown love affair, he probably was on his way out anyway.
If just a mistake/stupidity, I would take all information into consideration.
I guess that is what marriage counselling is for.
When I was younger, I thought I would kick his ass out the door.
Now that I am older, I believe I am wiser.
So, if the situation ever arised, I would deal with it.
Anger(lowlife SOB)
Revenge(you did it, so can I)
Reality(counselling and talking about the reason why)
The End( It is over, move on and work my "plan B")
Sandra