The Truth About Love (2005)

Director: John Hay
Cast: Branka KatiÄ‡, Dougray Scott, Jennifer Love Hewitt, Jimi Mistry, Kate Miles, Simon Webbe, Stefan Dennis, Thomas S.W. Boyd

Synopsis:

As part of a drunken bet with her sister Felicity, happily married Alice sends an anonymous Valentine’s card to her husband Sam to see if he hides it. When he does, what was a prank leads to a series of events and revelations that may put her marriage at risk, and leaves her looking for answers.