Tex. Family Code § 156.104

(a) Except as provided by Section 156.1045, the conviction of a conservator for an offense under Section 21.02, Penal Code, or the conviction of a conservator or an order deferring adjudication with regard to the conservator, for an offense involving the abuse of a child under Section 21.11, 22.011, or 22.021, Penal Code, is a material and substantial change of circumstances sufficient to justify a temporary order and modification of an existing court order or portion of a decree that provides for the appointment of a conservator or that sets the terms and conditions of conservatorship or for the possession of or access to a child.

(b) A person commits an offense if the person files a suit to modify an order or portion of a decree based on the grounds permitted under Subsection (a) and the person knows that the person against whom the motion is filed has not been convicted of an offense, or received deferred adjudication for an offense, under Section 21.02, 21.11, 22.011, or 22.021, Penal Code. An offense under this subsection is a Class B misdemeanor.