Grown man is still mommy's boy.

My boyfriend is always telling his mother every single thing we talk about and always listening to his dad regarding our relationship. For example if i tell him lets do something and his father disagrees - then we don't do it. His mom has a big mouth and tells everybody everything about my personal life. He is 26 yrs old and I feel as If I am with a 13 yr old child who is a mommy's boy. I'm sick of it. A couple of weeks agoà we all went on vacation and every fucking day!!! his mom would knock on our door to ask what her son was doing and his daily schedule. It got so bad to the point he had to talk to his mother to back off. Jesus I'm sicccck of it. I'm tired of his nosy mother and nosy father. They need to mind their business! We have 7 yrs together and a daughter and they still act like he's a child and he follows along. I don't know what to do or what to tell him anymore. If spoken numerous times with him and nothing changes.