My wife will look for a reasons to condem me.?

My wife will fine reasons to condem me. Many times she will tell my kids about my weekness and tell them the area I am week. It hearts me since I always uplifting her. we are in our 50's and she never wants to make love is a matter of fect she will pretand she is sleeping when I know she is just lieing. What should I do??? I many times MB to satisfy me.