My sister in law

I don't like my husband sister she is just aweful. She is like a fake person who acts like she never done anything bad in her life. What is killing me right now is that I'm pregrant and she has went around to people and said she will not claim my baby until she see that she looks like her brother. All our friends are pregnant and she makes the biggest deals on fb about there pictures and post and it really hurts my feelings that she doesn't even care about our baby . I asked my husband to ask her not to come around for a couple of weeks after my daughter because I don't feel the support and her showing up to be nosy will not help me at all. Give me some words of wisdom ladys would u care. Who u blow her off ... ??? Help I'm ready to lose it