My fiance is estranged from his parents and two siblings. There is heavy conflict that has lasted years and it is not about to go away. We are about midway through wedding planning, and have about finalized our guest list and just booked our venue. After getting his half of the list, I noticed his immediate family wasn't on it. Although I can't say I was shocked at all, since his parents were, to be honest, pretty terrible to him growing up and his siblings are chips off the old blocks, I couldn't help but realize something that hadn't really crossed my mind before now- that this would add a whole lot of tension to our wedding. He has not talked to his family for quite some time and though of course I will not divulge the details online, I can completely understand why. However, this obviously makes it very awkward since he DOES want his surviving grandparents, aunts, and uncles there. They all are very nice people, and for the most part have been very kind and understanding about his estrangement from his family, but I worry that this, to them, would be a whole different ball game and I really don't want them giving him (us) a hard time. It is very stressful for him when his family pushes the subject on this matter, because (understandably) he is afraid to lose the family he DOES get along with. How can we field questions from relatives, whether pushy "You need to invite them's" to well meaning "But they're your PARENTS?" in a polite manner that will keep tension to a minimum?