My brother (27M) with his girlfriend (25F) been dating about six months. He brought her home for thanksgiving and she’s a really sweet girl, I’m happy for them.

The problem is, he is SO beta and does everything he can to please her. Asks her once an hour if he can get her anything to drink, anything to eat, “oh you don’t want anything, are you sure?” Asks her if she needs his sweater, etc. I’m curious if I should say something to him, and if so, how would I even approach the situation?