Why do some women steal other's bf?

gr is always greener on the other side, as they say,but we know it's not.. she will have her come up, people like that aren't really happy,so sit back and watch, she has alot to deal with now. and i would let the husband in on what is happening. why not. he has the right to know what his wife is getting up to. your boyfriend isn't worth the hle. forget him and move on, i am sure their is someone out there that will treat you with respect, you can do better.