One good thing has come from this, your sil has proved herself to be totally ignorant on the subject of what it is like to have a child w diabetes. I honestly dont know very many people who have great relationships with their sil's. There is just something about that relationship that makes things difficult. PLUS the fact that she is the SECOND wife. That makes me think she is very touchy about her place in the family, and yet, look how she feels she can tell you what's what. Having said that, I wouldnt cut her out of my life. Just put up with her. Roll your eyes as much as you need to, and if she says something ignorant again just say "You could be right" in such a way that leaves no doubt that she is WRONG..and move on. She wont get it or admit it if you tell her outright that she is wrong and she wont learn or change her opinions. She is who she is, ignorant and insecure. Someone said it earlier, it IS about her. Im sorry you were hurt. Somehow people always know how to hurt us at our weakest sites. Hang in there. p.s. if you want to hurt her back in HER weakest spot, just say something like, oh, my first sil (whatever her name is) would have gone out of her way to learn all she could to support us...or something similar.. j/k I dont think you should do this..it just might make you feel better thinking about it..