I'm so sorry to read this my heart goes out to you.could you sit down with you brothers and sisters and tell them how you feel that you not coping well and need support from you brothers and sister to get though couple weeks without fighting. You got son 7 who missing is gran could you sit down and have chat with him just tell him gran bad and she needs here sleep.so when he do go visiting he might understand bit it's going to be shock to him if you don't say anything to him when time comes.all you can do is be there for you mother right up to the end it's going to be so hard for you all. Why don't you give sometime for uself if it's only go for walk and have think what you want to do hope this help. My situation my mother got bowel cancer that spread in her blood she been fighting cancer for two years. We haven long found out that inoperable they can't do anything we don't know how long she got everything happen to fast for us. Take care you came to right place for chat or advise hope every be ok keep us posted.