I'm in that boat where my eldest daughter is concerned. When her 1st marriage broke down she moved herself and her 2 daughters in with me until the divorce was finalised. She met and married with 2 years and to a man who everyone struggled with. Morose, opinionated, lazy, downright objectionable at times and was very vocal on how much he hated families. He had ostracised his own except for his father. I said nothing, it was her choice and I helped out as much as I could to support and keep an eye on her and the girls. I remember one time he lolled on the sofa watching me hang wallpaper that he had refused to do. That was him. Sadly, little by little, he drove a wedge between my daughter and granddaughters and her entire family. I have tried everything to build bridges but all the time he was in the background putting a spanner in the works. She eventually left him once the girls had left home and has married again I had hoped that this would result in a rekindling of our relationship but nothing. Is she ashamed by the way she treated us all, not sure how to approach any of us> Who knows. My advice to you would be to do your very best to keep the lines of communication open. Think before you say or text that nothing sounds judgemental or confrontational. Don't go on about your relationship with her siblings. Keep things light-hearted. Perhaps meet up with her on your own if she isn't keen on your partner. Ask that when she can, could you have some Mum and Daughter time. Good luck.