@anon325505: I'm no legal expert, but I have some concerns about your relatives' legal actions and your personal liability. You say you repaid every cent of the +/- $180,000 your late husband embezzled. Repaid to who? If your money went back into the original farm corporation's account, then I can't see where your relatives could file a lawsuit directly against you. It would either be against his estate or the farm corporation, assuming it still exists. You have clearly made financial restitution, even though the criminality remains with your late husband.
Do these relatives have a professional association with the family farm corporation? It seems like they could file a claim with the corporation directly and receive any legal settlements through it. You might still face legal claims as an officer of that corporation, but I can't see where you could be sued as a private citizen for actions taken by others.
You trusted him enough to sign blank checks, but you were acting under good faith. It would be a different case if your relatives had proof you knew he was writing improper checks and helped him get away with it, but your repayment of those debts should help your defense if a lawsuit is ever actually filed.