hi buffalo-
it might be best to create some peace for yourself by unfriending her on facebook.
and why not go out today and buy an alarm clock so that you have the option of keeping your phone turned off?
if you intuit that he is drinking, then he probably is.
it is wholly reasonable to ask for a few days by yourself. let him and his mother sort it out amongst themselves, without you in the loop.
she is not your friend or ally, i hope you can see this. a real friend is there when times are difficult.
hang in there! it might get worse before it gets better, but you are doing the right thing. you will get some peace if you cut off communication. it is your right to get some rest!
naive