So... sit them down and have the discussion with them.
Omg, I would go insane. I'd definitely talk with my spouse about it and make sure he agreed. Then, I'd want to sit down with the in laws and have a conversation about how to put up some boundaries so that they can build a life of their own and so that you can build memories with your immediate family.
Sounds like my in laws honestly, but only difference I live with mine. It’s really tough but unfortunately my husband doesn’t see the wrong. They overstep in everything, the MIL even told my boys to call her mama like ummm no they have me in there mum not you. It’s like she always wants them, and tells everyone we can go anywhere or do anything the boys need us. But tbh they are not needed at all
Legit sounds like you’re talking about my in laws 🥴 I feel like I’m going to snap any moment or start being a bitch all together