He’s Just Out of Treatment and Is Now Smoking Pot

He’s just out of treatment for heroin addiction and now at home smoking pot. His mother is very worried and unsure how to react. Should she let it slide and just focus on his recovery from heroin addiction? Or are there small steps she can take to try to reduce the pot smoking?
He Wants Money and Cigarettes While in Treatment

A mother doesn’t know what she should do when one of her sons asks for money and cigarettes while in treatment. He claims he can only get through this with smokes. Is this a reasonable request after all that has happened?