My finace and I are getting married at a venue that only allows 20 people (including me, my fiance, photographer, and officiator). I have 4 siblings with 2 of them having significant others, and i have 4 parents also. My fiance has 2 siblings with one of them having a significant other and he has 2 parents joining. So we have met our 20 person limit with just parents and siblings. Is it rude of us to not invite grandparents when we will be having a reception that they can celebrate with us at? My mom is having a hard time accepting the fact that my grandpa is not invited. She's not understanding the rule of only 20 people and wants my grandpa to sit at the top of the hill and watch us get married if he can't join down where we'll be. I just need other thought on this.