بسم الله الرحمن الرحيم
(Fatwa: 1149/748/L=9/1434)
If your cousin is eligible to receive zakah, your brother may give his zakah money to him. After taking the zakah money into his possession he may meet his family expenses with it. It should be noted that in this case if the brother of your cousin uses these things he shall not be considered as receiver of zakah.
Allah knows Best!
Darul Ifta,
Darul Uloom Deoband
