I agree. You can't force her to be there. It may even be good if she isn't there with a bad attitude. I know that sounds bad, but it could be worse. She could be there and tell him off like my S did with his Father and you would have an awful evening.
Sorry, girl.
Me 45, H 46, S 23, M 26, Together 30, Bomb 6-2-08, S 6-19-08; H left 12-29-08. H home 12-09, Still MLC in 2012! Me- I have my big girl panties on. Bring it.