You’re 79. Your husband is 3 months shy of 92 and in rapidly failing health. Your son and daughter-in-law went out of their way to get you a Christmas tree this morning so that you don’t have to trek out into the cold or worry about transporting a tree home yourself (as your husband is no longer capable of that kind of adventure and you’re certainly incapable of managing it on your own).
The correct response to this gesture would have been, “Thank you. That was very thoughtful,” not, “Where did you get it? You didn’t cut it down yourself? Well, what if *I* wanted to pick one out?”
My sister-in-law from overseas is here for the Thanksgiving holiday, and there have been several times during her visit that she’s said, flat out, that her mother is selfish. She’s not wrong.