AITA for canceling my girlfriend's return flight after she flew out to meet another man?

My girlfriend texted me from the airport: “I’m flying out to meet him, but don’t punish me by cutting off the card.” I locked it before the hotel hold went through, canceled every booking paid for with my money, and 3 hours later, she called me from a stranger’s phone, begging me to “stop embarrassing her.” ---------------🐋Whale Tales🐋--------------- #reddit #stories #redditstories