Missing my sister

As the title says I really miss my sister. She has always been such an important part of my life, she was always there for me and I was there for her. That is, until I got pregnant. I'm currently 38 weeks, and haven't seen her in quite a while. I know why. She and her husband have been trying to get pregnant for a very long time now (5 years) and it's just not working. I got pregnant almost immediately after my husband and I decided we were ready and after finding out it took me a moment to tell her because I somehow felt guilty that it happened as fast as it did for us. She seemed excited and genuinely happy for us, although through her previous stories I can't even imagine what it truly felt like, even if it was her own sister. I hoped our relationship wouldn't suffer, but it did. As my pregnancy progressed, she started ignoring me more and more, and becoming louder about things like how much more she and her husband made, how she can't understand why we even made a baby without having a better income (we make more than enough to have a happy life for the baby, I don't know where she gets that from) how we do so and so "wrong" etc. All of this became sort of part of the lunch/dinner table conversation whenever they would visit, and she became so passive aggressive about everything, that it made me cry my eyes out almost every time they left. By month seven of me being pregnant she stopped responding to texts (never has it happened before that we didn't talk), calls became a thing of the past. She would text mom pictures from whichever destination they were at, she would drop by to see her, but I became invisible or worse, someone who all of a sudden is an incompetent idiot, not deserving of a baby. I'm so sad. I do not know this person. This is not my sister. And I really don't know what to do. I couldn't keep my pregnancy a secret, what was she expecting me to do? I'm at such a loss right now, I truly don't know what to do or say anymore. 😔