Your mom handled that very well.
Her score of 247 said she could have likely taken care of herself if she needed to, but her sharp mind kept it from getting that far.
We're often taught that, as Christians, we need to be polite and giving. This can get us killed if we aren't careful.
Your mom had the wisdom to know that a man had no business approaching a lone, elderly woman, and she knew he was up to no good.
Send your mom a high-five for me.