From what you share she is using alcohol way too much which is giving her these strange mood shifts along with blacking out where she doesn’t remember and is lost. What you think is functioning is not. Adding to that she is being encouraged to punish you and put herself in this victim role by these women she is hanging out with. She is making up lies about things you never did.

All you are doing is listening to your sons and standing up for yourself. Of course she isn’t going to like this. And it’s not safe for her to be driving while using alcohol.