Yes, she did it herself, ipso facto, as a public and material Heretic.
Can. 1364 §1 An apostate from the faith, a heretic or a schismatic incurs a latae sententiae excommunication, without prejudice to the provision of Can. 194 §1, n. 2; a cleric, moreover, may be punished with the penalties mentioned in Can. 1336 §1, nn. 1, 2 and 3.