Will a woman cheat again if she has done it before?

that not just women. men cheat too and most of the time, not always, but most of the time if someone cheats once they are more likely to do it again. he cheating on her last boyfriend because he cheated sounds really immature and childish. everyone can change but it's good your friend has a friend like you to look out for him. only time will tell if she's invested in the relationship or not.