Am I required to let anyone I invite to the wedding bring a date? Tifanie, Boston, MA

In a perfect world, wedding budgets would be limitless and everyone could bring a date. However, all too often guest lists need trimming. You must invite the spouses, live-in partners, and fiancés of your guests. Although it is not required, it is nice to also invite both members of any long-term couple who aren't living together. Other than those situations, it is acceptable to just send a single invite.