BIL mad dad still alive

I guess that's what he wants, 12,500. He said that's his share of what was given to me and my 2 kids. FIL was our right mind up until last week. My husband wrote the checks. Yesterday he told me he didn't know, but he believed it, especially when I said dad said not to include the other 2. He said well that's menage dad's mad at # 2. After going home to his other half is when he called. I recorded call he states he knew dad wanted to give 1/3 to deceased sisters 2 kids that have not had contact. The one has come around and dad said 25k. Couldn't do it all in one year so half mid November rest this week. Like I said BIL doesn't have a problem with this week's check

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