I agree that you should not cut your friend out of your life just because she makes your brother uncomfortable. These situations are always tricky but you need to explain to your brother that he has nothing to fear. He is your brother, and you will love him no matter what, your friendship with his ex wont change that. His new wife probably just needs time to adjust, she probably still feels like a bit of an outsider in your family. First thing Id do is buy her a gift of some nice towels, and suggest she keeps them as "guest" towels! Perhaps she does not have much experience of small children, as she seems to have little patience with them, so I agree with BF that it is probably best if she and your brother spend time with them in neutral surroundings, like the park, cinema, Mc Donalds etc. The children could relax a bit and have fun without worrying about being shouted at, and your brother's wife could get to know them better and learn to be a bit more tolerant. Good luck with it and dont give up your friendship, a good friend is too valuable.