my brother and his wife can't have kids 😢

So I found out from my sister my brother and his wife can't have kids. I'm so upset by this. This isn't fair. I can't talk to anyone about this not even my husband. My sister made me promise. My sister in law thought about adapting but my brother doesn't want to. My heart brake for them. 😢💔 please pray for a miracle. I don't know the cause of why she can't have kids. My brother didn't tell my sister. My brother doesn't know I know and can't know I found out.