O and U, I have been where you are now, it’s awfully hard. Whatever you do just be yourself, thank him for the gift, only good manners, by text to both of them if that’s the communication they choose. If they don’t want you in their lives and won’t talk about it there is nothing you can do. After many years walking on egg shells, waiting for a visit that didn’t happen, not seeing my grandchild, we are not in touch anymore, because it took its toll, now I know where I stand.. She left me alone in a pandemic, I had Covid, there’s nothing more you can say really. No one would treat a neighbour like that, no excuses. You have each other, value the people in your life. Be the generous person you are. No more of his mind games, he doesn’t control you. . What an example to set grandchildren.