In Melton v. Waddell, a sister sued her brother for breach of fiduciary duty for misapplying funds in a joint account and not properly allocating revenues from real estate that they owned as tenants in common. No. 07-18-00105-CV, 2019 Tex. App. LEXIS 9531 (Tex. App.—Amarillo October 30, 2019, no…