It has nothing to do with the woman in most scenarios. If a man is going to cheat, his going to cheat - it's in his nature to talk to other woman, get them to that point of sleeping with them. It's probably those same traits why she is attracted to that kind of man. It's the gift and the curse - characteristics of a man that women love but don't see further down the line how it'll be at their own demise if they are expecting someone not to cheat.
It's good she is accepting she likes the type of man who will most often cheat, better to position herself long term and create boundaries with what she'll tolerant or not