Venice, clearly your mother was acting out of selfish motives. She could have kept the money, and lived it up for a week or two, but she chose the path of self glorification, seeking undue attention on herself, pretending to align herself with the righteous and seeking to hide her wickedness from the simple supermarket workers - who would be so easily fooled by her teacherous behavior. I think your mother is a very evil apostate indeed.
"God is not one to be mocked!".... whoops I'm dodging lightening boltz as I type!
Marilyn