Tex. R. App. P. 49.11
A party may not file a motion for rehearing or en banc reconsideration in the court of appeals after that party has filed a petition for review in the Supreme Court unless the court of appeals modifies its opinion or judgment after the petition for review is filed. The filing of a petition for review does not preclude another party from filing a motion for rehearing or en banc reconsideration or preclude the court of appeals from ruling on the motion. If a motion for rehearing or en banc reconsideration is timely filed after a petition for review is filed, the petitioner must immediately notify the Supreme Court clerk of the filing of the motion, and must notify the clerk when the last timely filed motion is overruled by the court of appeals.
Tex. R. App. P. 49.11