Partners & In-Laws

I am in my second trimester. My partner and I have been having alot of problems recently in regards to his parents getting involved. He and his mother has taken the time to draft out names for the baby without even asking me and they are even talking about where our child will be schooling without informing me. When i have voiced out my concern to him he gets defensive and with my pregnancy hormones I get so annoyed at him. Has any been through this?