I agree with riotgirll, why should you keep beating yourself up over this? By now you know she won't change she probably wouldn't even know how. Would she agree to have a session with a family counselor with the whole family present? She's definately feeling sorry for herself, that should not make you feel bad. She's jealous of you and your husband, it will stay that way until someone can analyize the situation, even your dad, who can help her not get so upset over such little things.