Giving zakaat to one's brother

Q: We have a joint family system. I am financially stable but my elder brother is struggling to survive. He is married and his wife shares a kitchen with us.

My question is can i give Zakat to my elder brother? As i said we have a shared kitchen, so I'm afraid if i give Zakat to my elder brother and with that money he brings some food, so that food will be halal for me? Even though it is not my intention that my brother bring food and share with us, but if some day it happens then what should i do?

Husband telling his wife "we are over"

Q: I have just given birth 3 weeks ago and been staying with my parents. My husband and I got into an argument and in a state of extreme anger he said we were over. This was done over text message as well as verbally over the phone. He also sent a text message to my mum telling her also that me and him were over. The actual word of divorce was never spoken. Everyone is telling us we are now divorced. Is this correct?

Eating after sehri ends

Q: I woke up this morning and drank water after fajr. Not realizing I needed to fast today. However, since then I haven't eaten or drank and want to keep my fast. Would it be accepted? I didn't know I had to fast today and a friend told me.