Wagner v. Wagner, case no. B197703 (2d Dist. Apr. 23, 2008) is more than just the latest installment of a familiar sad story: siblings fighting over Mom’s estate. It introduces the secret mental claim. Claire moved in with and took care of her Alzheimer’s-stricken mother for the four years preceding her death. Claire was the successor trustee to her mother’s living trust, so she became the trustee upon her mother’s death. Brother Kent grew impatient and dissatisfied with his sister’s administration of the trust, and convinced her to hire a lawyer. At a meeting of Kent, Claire, and the attorney, Claire told Kent that she intended to file a claim…