Hi K, Nice to see you on here smile Wasn't it your H that has only told his mum half of what's going on? If it was then I think he asked you because he wants you to be there for his mum's sake.
Go along and be happy and pleasant smile In Sandi's rules it says to accept invitations from him, but don't accept every one and don't cancel other arrangements that you may have made.
Don't worry too much about it either. Don't worry about what time you're going, what time you're going to leave, etc. Just play it by ear. There'll be plenty of other people there for you to talk to by the sounds of it and you won't have to spend all your time in his company.
Don't follow your H around like a lap dog, let him approach you if he wants to talk to you. Spend your time having fun with your kids and talking to friends and family. If he speaks to you or engages in conversation, then stop and talk to him.
That's all the advice I can think of at the mo smile Thanks for asking me, I'm honoured that you've asked my advice smile

H47 me48
T22 M21
S20 - Got high functioning autism
3/2000 H admits to OW and moves out to live with her
11/2000 H moves back home
2/4/13 H moves out
H tells me he wants D 6/13, but now he can't afford to!