Sorry to hear about your mother in law. Have you got your own friends & family to talk to? I found when my father in law was dying & his family were in denial that it helped me to be strong to talk with my nearest & dearest who weren't connected to that side of the family. Also has your mother in law got other family who she can talk to about her wishes, she needs to be able to put these across to someone & it might help you all cope by you talking with her so you can support her son by knowing what she would like care wise etc... Hopefully by talking things through you will gain strength for yourself, your mother in law and her son. Remember you'll always stronger than you believe!!