Texas Family Code - FAM § 102.005. Standing to Request Termination and Adoption

(1) a stepparent of the child;

(2) an adult who, as the result of a placement for adoption, has had actual possession and control of the child at any time during the 30-day period preceding the filing of the petition;

(3) an adult who has had actual possession and control of the child for not less than two months during the three-month period preceding the filing of the petition;

(4) an adult who has adopted, or is the foster parent of and has petitioned to adopt, a sibling of the child; or

(5) another adult whom the court determines to have had substantial past contact with the child sufficient to warrant standing to do so.