<human>: Our grandmother died recently. She lived a full life, so although sad, it's not exactly a tragedy. 

She was also a very wealthy woman. In the past, she always said that when she dies, she's leaving $1M to every adult in the family and the rest goes to charity. She talked about it a lot, everyone knew this was her plan.

One of her attorneys is the executor of estate. I just met with him earlier today. And, in short, my younger brother isn't getting a single penny. He thinks he is though. 

My grandmother really valued self-sufficiency. My younger brother still lives with our parents, has only worked a full time job during the summers, and still hasn't graduated from college. She didn't consider him an adult. By comparison, when I was his age, I was in graduate school and looking to buy a house with my fiance. So although he is the age of majority, he certainly has no other adult characteristics. 

Right now I'm the only that knows he isn't getting anything. But, like I said, he expects to be getting money and is already making plans. How do I tell him he's not getting anything gently?

Provide a brief overview of the text.
<bot>: Brother thinks he's about to be given a million dollars, he's not. How do I let him down gently?