Am I being a B about this???

So here's the story. My sister in law (brothers wife) has been struggling with unexplained fertility for years. Me having had 3 second trimester losses of which she knows about, completely understands their situation. Okay so feel pregnant with my son and had to be all hush hush about it because I wanted to avoid being all up in her face about my being pregnant. She was the first person I told and we cried together (I was crying because I didn't think it was possible as I have pcos and endometriosis) anyways she cried and it seemed abit as if she was crying because I was pregnant. During my pregnancy I tried to include her in everything pertaining to the pregnancy. Scans which she declined, I invited her to join my husband and I to a baby expo(she declined) all the while I completely understand why. I would wear baggy clothes to kinda hide the baby bump that was forming so beautifully. I didn't rub my tummy to bond with my son in front of her. I was just behaving like a normal woman. So she starts spreading stories about me and gives me so much stress during my pregnancy I still invited her to the hospital when my son was born. Okay ffw to 2019..i conceive my daughter and again my sil looks for things where we fight and argue and not speak. I again look past it all and she's at the hospital to see baby. During the pregnancy with my daughter I adapted the same thing not showing off and trying not to be all up in her face. So then they announce that they are expecting. All of a sudden we can talk about baby things, she shows me scans and shows off her bump. She rubs her stomach and all that. Trust me I am so freaking happy for them as they waited sooooo long and i know how it feel to want a baby. I just feel like she's all up in my face as if I've never been pregnant and I feel like something else is going on here. Am I right to feel this way or am I clutching at straws?

Things are a little weird now... They have returned all my sons things that have been there while he would be with them at their house on weekends. Wtf is happening?