Take This Waltz (2011), directed by Sarah Polley

Michelle Williams is Margot, married to man-child Lou, played by Seth Rogan in serious mode. She adores his family and they her. They have fun together, laughing and playing pranks, and they throw great parties, but their sex drives are not in sync and after five years of marriage he won’t even discuss having children. So Margot is ripe to fall hard for Daniel, a charming and free-spirited neighbour. But is passion enough to sustain a relationship and is it worth giving up family and friendship for? A complex and quirky relationship drama that doesn’t pretend to have the answers, it has a few unlikely plot points and a rather flat ending. It’s refreshing that it is set in Canada. Sarah Silverman is striking as Lou’s alcoholic sister but the film belongs to Michelle Williams, who embodies Polley’s heroine.