you know benny maybe she is embarrassed about something at home, it may be nothing major but she does not want you to see whatever it is for fear you will judge her. it reminds me of when kids are younger and going to each others houses, one kid doesnt want anyone to visit them because their house is untidy or cluttered with ornaments (that was a reason for a friend of mine, she also thought her mom was mad (she wasnt)
maybe she needs to open up a bit more about her life, there must be some reason behind the cloak and dagger behaviour