I dont care for my MIL

A

A while back my boyfriend was telling me his mom wanted to help pay for some of the baby shower and just help out so my mom paid for half of the building and I told his mom she could pay for the other half she said okay but the problem is anytime i text and ask her somthing she never replies to me but she will tell my boyfriend when he has no clue what's going on. Than she said she wanted to help with decorations her and my mother actually talked about that but once again she doesn't tell me or my mom anything she tells my boyfriend and hes asking me what shes talking about why does she keep communicating with him it's just so annoying. Than shes kind of funny acting in my opinion like I texted her a while back saying "hey the baby shower is dec 15th at 2. What exactly were you wanting to help with" and all she responded with was "who is hey" didnt reply to my question at all but than she ask my boyfriend a few days later what we needed her to help with. Shes just one of those people I feel like I cant talk to normally like what am I gonna say wrong this time. I talk to her no different than I talk to my mom so idk what the issue is