I have a 11 month old cat named Alexis who has a major behavior issue. She cries non-stop to be let in/out of the bedroom when we are sleeping. I cant keep the door open because her brother is ill-behaved at night and claws our mattress while we are trying to sleep. So in order to keep him out we close the door, usually with Lexi outside too. She will then yowl to be let in non-stop, once we let her in she will be content for 15 minutes....so we fall back asleep....before she starts yowling again to be let out....ect ect. I cant take this. I have only a small one bedroom apartment so its not like I can lock her in another room where I wont hear her. HELP!