DEAR ANNIE: My situation is not a unique one in that I know many women experience difficulties with daughters-in-law. I have had discussions with my son about my feelings, but I really do not wish to cause further strife between him and me nor between him and his wife. They live very near her family members and everything they do and every holiday involves just her family. I feel as though my family is an afterthought, and that I am occasionally kept within their lives merely as a resource for gifts and financial help if and when needed. My question is, because I feel this way, should I cut ba…