Brake ups & cheating?

I know this girl who’s been messing with a married man who has a family for around a year now she says she loves him & she rather not be with no one else but him my question is why do you guys go out your relationship you have with a female that you been with for years to go have sex with someone else why don’t you just leave her instead of cheating 😩
Brake ups & cheating?
Add Opinion