I imagined myself as David. So as per question,:-
" If I had seen Miss Betsy Trotwood mistreating David's mother, .i.e., my mother, then i would feel to mistreat her back and take revenge. But i cant. This is because I have to accept Miss Betsy Trotwood as a guest and mother. Also, Pegotty would feel bad for mistreating Betsy as she is the lady of my mother's new would-be husband.
It means that infront of everyone, i would be doing an immoral behaviour by taking revenge on my aunt. I can even be told to leave the house at the moment. I also am a boy younger and unmatured than her.
But after going to Salem's, I would come back and tell her how rude she was to my mom and me because now I have been matured and would have a power to talk back. "
This is what I would have done.