Lets face the fact, some Filipina only marry foreigner because of financial reasons, and that is the one of the possible reason why they cheat. Because they're not happy with their partner simply because they don't love them. But for those filipina that marry her man for love,its so tiny chance for her to cheat,especially if he take care of her and give her all his time and love.
But as what they said as well, once a cheater always a cheater. so lets watch out for that.
I know a girl in my place who marry a rich old foreigner,he's a nice man but she cheat on him always specially if he went back to his place. The guy is on his 70's and she's on her 20's. I ask her why she do it, and she said that she is not happy with him, so I told her to let him go but she said she cant coz her family need him and she wants to give her daughter a good life. I dont know if I get mad or I feel pity,coz I know her since she was a kid,and she is a nice girl.
So, maybe not all cheaters are bad,some have their personal reason why they do it,but others do it for the sake of cheating and having fun.