Is your relationship with him otherwise good and do you want it to continue?

I agree with the other posters he is overly doting on his mother to the exclusion of you. Is this only during the holidays?

I admire how you can be so upset with him during this time, but then go on to have your normal relationship once the holidays are over like you have done in the past. I am not such a big person to let those kind of things go. I’d have stayed mad and probably broken up.

I’ve had a similar issue in reverse. My young son just got married and completely alienated himself from us, his parents, due to his wife’s ‘brainwashing’(?).

There should be a healthy balance where the man mostly puts his wife first, but also honors his parents’ reasonable wishes.

I’m sorry you find yourself in this situation. At your ages, if your basic relationship is a good one, you will probably just want to find yourself something else to do over the holidays and yield to his extreme need to please his overly needy mother. Gosh, I hope it doesn’t transfer to an aunt when she passes!