I don't understand what this fixation with Cindy cucking Ian is. It is as Leongen43 said, the only person she has to be faithful to is her boyfriend and she is not. Also, because she might have some sexy time with Axel she is a bitch? Look who's talking!
You're the one she is cheating on her boyfriend, YOUR friend with. Say she does get with Axel, if you were just playing around with her why should you care who she sleeps with? If you were hoping for a serious relationship, hey you're the one trying to date a cheater. I mean...what were you expecting