Counter with That Sense of Entitlement

I received a counter offer for the offer I made Bill. It is strikingly reminiscent of the interactions that went on between Bill and his sister as they settled their parents' estate. Bill waited for her to lead off, then countered with a suckerpunch. He wanted to see how much she'd offer. He told me that much. But in the end, it didn't matter what she came up with, he knew what he was going to do. His response to my offer sounded much the same. He countered with a ridiculous demand. Why did I pay all that money to a forensic accountant to carefully go over the values of the house, the retirement and the tax sheltered annuity when he was just going to respond with a demand that reflected how much money he wants for himself? It doesn't really have to do with what things are really worth. Bill just basically said he wants a one-time lump sum of $165,000 and $4500 a month until he dies. He wants to be the beneficiary on my life insurance policy, he wants the restraining order lifted, and he wants to be able to go to the police station and pick up his guns. It's all outrageous to me. And then, in the end, he said that if I didn't acquiesce to his demands, he would get a QDRO and have the retirement system give him the cash value of what he is due. My attorney said he has some ideas for a response. I can't wait to hear what they are.