I agree, why would one want to hurt the wife of a cheating hubby? Hell, she's hurting enough or will be when she has her world devastated knowing about this cheap affair.
I can't be sympathetic, I've been hurt like that, hubby's slutty former co-worker, who also was married and had kids of her own, she even had an affair with her husband's twin brother, too.
Sure we worked on things and put the pieces back, and we are happy now. But definately triggered me into a meltdown, so unfair to do that to another person.
No man or woman in the world is worth ruining your life with.
Drop him and move on, leave his wife alone, he's the creep, and you can bet he'd eventualy be sneaking behind your back with someone else, that's if he isn't already.
Don't waste your life with this S.O.B.
Take care now