Mother in law

My mother in law is starting to get on my damn nerves and in the way of me and her son’s relationship. Everything he gives to me she thinks she’s supposed to have it.

She keeps making little smart comments of how when we buy our house she’s going to move in, and when me and him exchanged gifts on Christmas she made the comment “ugh y’all two spoiled asses and snared up her nose”

What should I do? Because honestly I’m ready to end our relationship because it’s becoming too much.