First of all , any man who messes with a married woman is a lowlife in my book.
I've seen this and have been the victim of a married woman's " not feeling good about something ". It's usually low self esteem or a marriage problem.
Now as a guy myself I can see the temptation and I usually can't really blame the guy.
I blame the woman for , at least a short period of time , becoming a *****. They find a million reasons to cry on some other guys shoulder and then it goes from there.
I'm sorry , but I'm old school on this. Take my advice , it's not going to be worth the trouble.
If your having problems with how to conduct yourself properly with females get help before you get yourself in trouble.
Just MHO.