Couple's Court: Keisha and Derek

Derek believes that his fiancée Keisha is not faithful when she stays out all night "with her girlfriends". Keisha says that if he trusts her, this is a non-issue, sometimes it's just late and she crashes. When asked why she goes out if she knows it bothers him so much, she says she's allowed to have her freedom too. Would it bother you if your significant other slept out on "friends night out"?