Not feeling involved

So I'm currently 19 weeks pregnant with our planned baby and I'm really feeling uninvolved in the process of having her and getting things for her because my MIL decided to buy the crib, bassinet and pram without even asking first. I don't have the heart to tell my S/O that it really hurt my feelings because I don't want him thinking I'm mad at his mom, when really I'm hurt she didn't involve me in the process. Am I being ungrateful? I thanked her for everything but deep down I feel so disconnected from being prepared and excited because the huge parts were taken away from me, I've been dreaming about this baby for years and all the things I'd get to buy but now I feel left out.