My mom (F45) makes Christmas terrible for me (M14) and my brother (M17)

My mom gets anxious and stressed very easily and usually takes it out verbally on me or my older brother. Around Christmas it gets a lot worse because of getting presents and my dads family visiting who she doesn’t really get along with. This honestly ruins Christmas for me as I can’t get the feeling of her inevitably flipping out on me or my brother and makes me extremely stressed. Is there anything I can do to enjoy the time with my family and not be stressed?