Is it at least causing the estranged brother some degree of heartburn/expense?

I mean he’s playing with house money and has gotten an IRS tax debt paid off along with four years of free living expenses and will ultimately get the bulk of the proceeds of the remaining item of the estate, so extremely limited heartburn.

Also, shockingly it’s driving a wedge between the two brothers and the sister because they are obsessed with getting this one over and she just doesn’t have the energy.

I believe in vengeance more than I should, and there was definitely fraud, legal malpractice, elder abuse, and theft, but at some point you fucked up and you are throwing good money after bad.

“Cut your losses” is such an important concept

No better advice.