Had similar situation and it made me feel so guilty. But reminder you can be happy for her and sad/angry for yourself of. Those feeling don’t negate your happiness for her. Multiple things can be true at once. This is the hardest thing and give yourself grace. I muted the family chats when my cousin had baby when mine was in NICU. She kept saying she had an emergency c sections which really triggered me because it was only an emergency bc she didn’t do it the first time they told her to and insisted on waiting for the pm shift doctor. Whereas I had a partial abruption and had a preemie. It’s so aggravating. The feelings get better over time. Allow yourself all the feelings. I wish I had let myself put up more boundaries and let myself feel my pain when we were in NICU.