Nick Cassavetes will helm pic starring Cameron Diaz and Leslie Mann
Nikolaj Coster Waldau also stars with Nick Cassavetes helming.
Julie Yorn will produce through LBI Prods. Melissa Stack is penning the script about a woman, who, after realizing she is not her boyfriend’s primary lover, plots with the man’s wife for revenge.
Upton would play the woman Coster Waldau’s character is cheating with on the other two ladies.