my dear sister has terminal cancer, but her husband won't allow me to visit her at home.(it has been like that for decades) he has always been like that, a total controller. he rings me when he is stressed, yet we are only "allowed" to communicate by phone, always been like that.they live in an 11th floor flat, have no friends. she has just left hospital, and will be alone there until the end. he won't allow tv, so it's just the four walls for her.i long to see her, and hold her. of course I could go there, but the anxiety it could cause her would make me feel so bad. I "bravely" went to the hospital to see her,( she was so happy to see me) but he kept ringing her, until finally she suggested I should go home, as I had a long journey.he rang to say she is very weak, but my hands are tied. what can I do, before it's too late.