Sister in law

So my sister in law is ok to be around normally, but she recently decided to join the party of TTC (I've been a part of said party for 3+ years) she is already pregnant and only wants to talk about how her pregnancy is and how she can't wait and what not. Is it insensitive of me to not care? I don't want to hurt her feelings by telling her I don't care that she's pregnant, I don't want to celebrate, I don't want to be around her, I want 100% nothing to do with her until her kid is like 1+. I feel like she is doing to hurt my feelings because in 2018 I was pregnant, she was rude to me about it and now expects me to care that she's pregnant. There was no care when I lost my child, there was no joy when I announced my pregnancy so why should I be happy for her or even give her the attention she wants?

Back story

Its may 2018, I found out I was pregnant, I was so excited (as it was my first pregnancy) I wanted kids so bad so I was over the moon. First I told my younger sister, she was so excited to be an aunt, then we told my husbands parents and sister. His mom, she was excited, his step dad and sister on the other hand? Not so much. His sister told us we were stupid and that we won't be able to take care of a baby. My step-father in law he was going on about how we should have used protection and how my husband is an idiot and on and on. I had a miscarriage 7/10/18, my mother in law was heart broken, she just wanted to be a mimi(grandma). My sister in law said it was for the best because we weren't ready (because we were 18+19).

Now

My sister in law spontaneously decided to start trying for kids, it took her 2 months and now all she wants to do is talk to me and my husband about how she's pregnant. Recently my husbands siblings had a small get together and any time one of my husbands other siblings tried to give some advice to him for our TTC trip she tried to make it about her. I don't want to make it about me but I just don't care that she is pregnant.