Chloe (2009)

Genre: Drama | Thriller
Tagline: If the one you love was lying to you, how far would you go to find out the truth?
starring: Julianne Moore, Liam Neeson, Amanda Seyfried, Nina Dobrev, Meghan Heffern and Max Thieriot.

Plot: A doctor hires an escort to seduce her husband, whom she suspects of cheating, though unforeseen events put the family in danger.

http://www.imdb.com/title/tt1352824/
http://en.wikipedia.org/wiki/Chloe_(film)