Religion vs roommates...?

I'm having a problem with my roommate, who is my cousin as well and she's a Jehovah's witness. When we first became roommate, everything was good...up till now. I told her flat out that Im a Christian with my own beliefs and she can't get mad at that. Now the crazy girl wanna put me out cuz my religion is "tainting the holy spirit of Jehovah" in her house. My question is does my religion -really- taint the spirit of Jehovah...or is this girl just plain nuts? Plz answer!