AITA for telling my sister her "miracle baby" isn't special

I (30f) have three kids. They're my pride and joy. But yesterday my sister (29f) came over for lunch with her husband and what she called the "miracle baby". She was pregnant 17 times before this one and all of them lost gestational age as her body wouldn't hold the pregnancies. She finally had a csection with this one and it's a healthy baby. She was braggish about it. Bragging about being able to have the csection, the fact everyone call her "the miracle lady" at work, how all her family and friends are amazed at her. <br><br>I got annoyed at that and said her baby wasn't special. That there are countless people with babies. I have three. That I'm sure she's not the only person to get that title. I said that the only miracle was that her body finally co-operated and she shouldn't be so focused on that. She should enjoy her baby.<br><br>She got mad and said I was ruining her victory. She said I don't understand as my pregnancies are easy and I don't know hardship. I said her baby and me are just as hard regardless of the complications. That she's wasting her time with her "miracle lady" title and her pity party. My parents agree with me. They said she's being silly. <br><br>My sister said I was heartless. That I should encourage her. That she should be allowed to enjoy this.<br><br>AITA?