I agree with your mom. Go home to honor your grandmother. If your W chooses to go, that's her choice. Don't let that dirty the honoring of your grandmother.
It isn't just that... I just don't want to let my D4 and W down financially.. We need the money. I know we are separated, but I still want to be there for her. Especially since she is still looking for a job.
She still wants me to move out when I get home, so there is that financial obstacle as well...