Both my grandmas have been widowed for 10+ years. Neither have dated or pursued any sort of romantic relationship. Because they are single am I required to give them a plus 1? The reason I ask is because my paternal grandma lives with 2 of my uncles who I will not be inviting to the wedding. I'm already worried that she will try to bring them, but it would be a guarentee if I were to give her a plus 1. Thoughts?