How should one act concerning a mother who steals small things, given her old age and the fear for her well-being?

This is an ordeal that requires seeking Allah's help, wisdom in handling the situation, and offering advice. Perhaps the mother was negligent, forgot, or was overcome by old age. If you are certain that she is stealing, strengthen her faith through prayer, Quran, and remembrance, and remind her of Allah through both intimidation and encouragement. Explain to her that this world is fleeting and that consuming people's rights is dangerous, and that the oppressed will take from the oppressor's good deeds on the Day of Judgment. Alert her to consider the reputation of her children and grandchildren, and warn her of scandal and bad reputation if her matter is exposed. Reduce her trips to the markets, and strive to fulfill her needs so that she does not have to steal. Seize the opportunity of catching thieves so that it serves as a deterrent for her.