The Dilemma

The Dilemma is a 2011 American comedy-drama movie. It was produced by Ron Howard, Vince Vaughn and Brian Grazer. It was directed by Howard.
Plot.
Ronny Valentine (Vince Vaughn) who catches his best friend's wife, Geneva (Winona Ryder) cheating on him with another man, Zip (Channing Tatum) and does not know whether he should tell him.