How can you trust a girl in a relationship who has a history of fooling around?

I Say, Once a Cheater ALWAYS a Cheater.

I say this because someone's morals are what dictate if they will cheat or not cheat.

If you know for a fact that Someone has CHEATED, that means their morals allow them to rationalize that cheating is something that is acceptable on a certain level; therefore making it likely that if they are in a similar situation again (and having rationalized cheating in the past), I strongly believe he or she could/would cheat again.

it all depends can the find what their looking for in you? if so they wont find a reason to cheat on perfect