(a) Except as provided by Subsection (b), a guardian of the estate who loans estate money with the court's approval on security approved by the court is not personally liable if the borrower is unable to repay the money and the security fails.
(b) If the guardian committed fraud or was negligent in making or managing the loan, including in collecting the loan, the guardian and the guardian's surety are liable for the loss sustained by the guardianship estate as a result of the fraud or negligence.