People who make mean comments really suck. How cruel of her.
(Many adults do colouring these days as it is good for the brain apparently, and can be relaxing, but it does not sound like that person meant it in any kind, supportive or sensible way grrrrr)
I too wish I had made a sarcastic comment back to ''family'' members who constantly put me down. I was (and am) the ''bigger'' person, and so are you!
Surely an older lady ''should'' have known better grrr.. Some of the meanest relatives to me were over 60