My step father claims that a life insurance payout that went into my mother's estate, of which he had made the payments on should have gone to him.

I got the most from her estate but he got some too, even though she did not want to leave him anything since he drank their whole marriage and she paid most the bills and owned the house. He got $100,000. plus he gets social security and had some stocks. In 2 1/2 years he has used it all, living above his means. he now says I owe that money to him ($66,000.) because it is really his he says, but we were coexecutors and he let that money go into the estate maybe because he had to. I have paid off huge student loans and now I don't have much money left for my old age or my children but he is claiming it is "Elderly financial abuse" not to give him that money. He has helped me in the past but I know he needs to live within his means...that money will be gone in two years. I could live off it for six years. he will not give up his office which he does not really use and has two huge rents etc. He is talking to a lawyer to get that money from me. can he? The estate was settled Nov.2009.