This Means War (2012)

CIA agents and best friends Tuck and FDR have been benched because someone's after them. Tuck is divorced and not close to his son; FDR is a ladies' man. Tuck places his profile on a dating site; Lauren sees it and goes out with him. She later bumps into FDR; he hits on her and she goes out with him. She's intrigued by both of them. When they learn they're both dating her, they agree to let her choose, but they can't help using their skills to keep tabs on her and each other, and sabotage each other's dates with her.