My advice is not to go. send your present and blessings...
from the posts I've read, i can't help sensing that you are not
totally over her, and that the only reason you wanna go is to prove
that you are over her,
getting a gal to go with you, to show that you have moved on?
Remember one thing, this is HER night. Her's and her husband's
night. you have nothing to prove, If you really want to go, go but
remember HER night. so don't over drink.