My mom passed away two years ago after about 5 years of being really sick. A year after she passed my dad began dating. My grandma (mom's mom) and him no longer talk because of it. It will be awkward enough for them to both be there...my grandma is paying the bill not my dad. She doesn't want his girlfriend there. She doesn't want anyone thinking that's my mom that doesn't know and thinks it's disrespectful to her. She even suggested I not have him even walk my down the aisle if he's going to act like this (dating and refusing to help out, lots of drama there- he kind of dropped having anything to do with me and any type of support after my mom passed and I was in school..not saying he was obligated to help with, but dealing with that surprise at that time when it had been planned to have assistance was kind of hard. Grandma has stepped in and helped with rent etc until I graduated). My fiancé' thinks my grandma is being utterly ridiculous and he wants to have a talk with her. That absolutely will not work. She will hate him then too...she's just not able to be talked to about this. I don't know what to do. She helped raise me and has already paid a big chunk of it...but I also don't want to cut my dad out completely. Is it required that I invite this GF? I've only met her once or twice and she's fine...but it just seems like that's the easiest. I thought about saying only engaged and married couples period (all of our friends are already there so it wouldn't cut out anyone else really)?? advice please!