I have 3 roommates: A, B, and C. All three have girlfriends.

Roommate A is the guy I share a room with, B and C sleep in the other room. B's girlfriend is constantly over at our apartment, to the point where she just hangs out here whenever not at work or school. Today we (roommate A and myself) found out that she keeps clothes here and showers on occasion in the other guys' bathroom. Roommate A confronted her when he came home from school and she was just here by herself. She ran to B and C, crying, saying that A was being rude and accusing her of breaking the law of chastity (which he didn't go that far, at least from what he told me he had said).

Being in BYU off-campus housing, is having her clothes here along with her taking showers here a big deal?