The nephews of an elderly lady of around eighty years old, give her their Zakat-ul-Fitr (obligatory charity paid before the Festival of Breaking the Fast) and the Zakah (obligatory charity) on their wealth. When they visit her, they refuse to eat the food she offers them, in case they will be eating food bought with their Zakah money.
This upsets the lady and she has asked them not to give her any more money. She has no sons, just three daughters who are married and live with their husbands. I need your advice and may Allah be merciful with you!
If the reality is as you mentioned, there is no problem in them eating the lawful food she offers them. The fact that they give her some of their Zakah money does not mean they should abstain from eating food bought with their Zakah money or the Zakah money of other people, as it has already been given to a rightful recipient.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.