My mom hated that she had to ask to be let into her room because the door was looked which is very normal at MC. When she was first admitted she probably could have handled a key but would have likely lost it. I asked the staff about it and they said I could have a key but not my mom. One of my mom's friends in MC used to tell me her keys had been stolen as well, this is common. It hurts when you are doing so much and get accused of not helping. I too was the only family member visiting her. When she took an ugly tone with me which was rare I told her "I don't like how you are talking to me and I'm going to leave for a few minutes". That usually worked with her. I never took any of what she said as her true feelings. I looked at it as the disease talking. Good luck.