Tell me how ****** up this **** is?

Ok I recently found out that this skank I've been dating and she was living at my house btw slept with my brother and some other guy a few days b4 we got together I thought she was a good girl and would never lie to me like that but she didn't tell me until my brother told me tonight he spilled his guts out to me and it disgusted me bc I also found tonight that the reason why her ex broke up with her bc she cheated on him and i am so pissed off I can't even go to sleep I called her stupid and told her to get the **** out of my house I'm pissed bc she lied to me over and over again about who she slept with and that she wasn't the girl I thought she was it makes me sick to my stomach