I'm not being ungrateful but wtf ?

I'm currently pregnant and my mother in law has been being veryyyy childish I'm not even sure why she's blocked me then unblocked me , laughed when i told her about the baby , has been being very rude to my husband today she brought a pack & play box over and we were happy we thanked her when she left we opened it and there was only one of the mesh parts 😕 I'm honestly not sure what her problem is I've been nothing but nice to her 🤦🏼.