Hi everyone! Uncle Jim is bringing his girlfriend, who is a widow, to our wedding. I asked him for her full name and whether she goes by Mrs. or Ms., and he gave me her name but not her preference on Mrs. vs Ms. I've never met her and don't have any way to contact her directly. Since I don't know her preference, I believe the traditional form would be to address her as Mrs., however that seems a bit weird given that she's been dating Uncle Jim for over a year now. What would be the proper invite ettiquette in this case? Thank you in advance for your advice!