Too much..I would suggest something more like this..."Going to the reunion and Hockey game Saturday. Might talk with the kids about getting a hotel room afterwords if things go well."
I would suppose this is a family event? Those invites are tough. You don't want to alienate her, but at the same time you shouldn't re-invite her either. Does she knows that she was invited? It is a double edged sword with family invites....I would chose the duller edge if possible.
