It's rude to disallow a roommate from having guests over.
Penny recently began renting a room in her house to Hope, but Penny gets upset when Hope has friends over and they make a mess in the living room.
Penny wants to keep a tidy living space.
Penny sits down and comes up with house rules regarding guests and cleanup with Hope.
Penny bans Hope from having friends over.
Penny is relieved that conflict with her roommate is avoided.
Penny starts to feel uncomfortable because Hope gets hostile towards her.