After a very long conversation it has transpired that DP thinks his sky has an issue with us. She has some "split loyalty" issues and afaik she doesn't wants to upset his exW for being close to us. Their split happened years ago and she's always been weird but with wedding date upobus I've told told him that she either comes in "good faith" or she's not welcome. I understand the split royalty thing, but it's time to move on as I'm as part of the family as the exW was/is.