Mom is playing lotto (approx. $100 per day), at the same candy store. Can I ask the owner of the store not to allow her to play?

My mother has always been bad with money. Her and my Dad lived apart for over 40 years, but when he got sick, she took him in and took his money. My Dad has since passed and she retired. Her memory is getting sketchy and she's spending massive amounts of money on lotto. She now expects her children to supplement her spending if she runs out of money. She has not admitted to playing lotto. Claims she loses her money. Within a week she took out over $500 but didn't have $10 to purchase cat food. Her fridge is always empty. When questioned, she deflects the question by asking, why are you looking at my bank account. When I tell her to be mindful of what she spends her money on, she gets defensive. When her bank balance gets very low, she goes to the bank asking where her money went. She has accused me in the past of "stealing" her money. When I remind her that I supplement her social security so she has extra spending money, she tells me she'll pay me back (which of course she doesn't because she has no money). I do have an appointment with an Elder Care Lawyer. I made arrangements to have her social security deposited into an account she has no access to and will transfer spending money into her account. My question is, if I spoke with the store owner and requested that he doesn't take the $100 per day she is spending on lotto and he doesn't agree, is there something legally I can do to stop him from taking her money? My mother is 85 years old. Thank you.