Pretty sure I mentioned the other 5 people involved in this as well, in case you haven't noticed.

Hummel, this isn't about a girl or the patriarchy oppressing anyone. If you sleep with your boss, you will be called out on it too. If you start an intimate relationship with someone, it will change their view on you and how they treat you, simple as that. I don't say she is not allowed to have sex with whomever she likes, although cheating on your SO is a fucked up thing, but wether it was her sole purpose or not, she shouldn't have done it in the first place. There are just people whom you shouldn't be in a relationship like that, this goes for males and females alike.