Blowback

Alex Mason is one of the world's best secret agents. He's also never been very good with women. His controlling and conniving girlfriend, Monica, is the best he's been able to do. While on a mission to stop an arms dealer, she accuses him (incorrectly) of infidelity for the last time, and he breaks up with her. As she exacts her revenge, Monica discovers Alex's true occupation as a spy and decides the best payback is to blow his cover to the arms dealer who is now looking for him. Espionage is a bitch.