I'm way early for this, but it's been puzzling me and I can't find the answer anywhere.
My parents will be hosting. They are married and my mother kept her name. But it seems that writing "Ms. Jane Doe and Mr. John Smith request the pleasure of your company..." supposedly indicates that they are divorced? There's no way my mother or I would go for "Mr. and Mrs. John Smith."
I don't want to use "together with their families" because I do want to honor my parents as the hosts.