I am the type of person that is very sensitive to things like this. I expect commitment. If I found out my partner was cheating or even flirting (the flirting thing actually happened,) I wouldn't put up with the bitch even though she says "I never did anything." Basically, break up with the bitch and burn all the shit she gave me. Seems harsh, but unfaithful partners are straight up stupid.

if that person cheated on you their more likely to cheat again probably with knowing or on purpose because you let that person get away with it the first time so i would end it

I would try and work it out with my partner and see if i can trust that person again