I understand all of the wedding etiquette and even agree with inviting SO of long term relationships, but when is it ok to NOT invite an SO of a family member? Here's the situation (in short). My aunt's boyfriend lives with her and he and I don't get a long at all. The reason being: He has a problem with alcoholism. He is mean and gets out of control. Some family members don't even want him at their house for casual social gatherings, hell some were pissed that she brought him to my grandmother's funeral. I don't believe I should invite him. My FI and I want our friends and family to have a nice time and to not feel uncomfortable at our wedding reception (which has an open bar). What does etiquette say about this?