Four Holidays (2008)

When upscale, happily unmarried San Francisco couple Kate and Brad find themselves socked in by fog on Christmas morning, their exotic vacation plans morph into the family-centric holiday they had, until now, gleefully avoided. Out of obligation - and unable to escape - they trudge to not one, not two, but four relative-choked festivities, increasingly mortified to find childhood fears raised, adolescent wounds reopened... and their very future together uncertain.

Official website: http://www.fourchristmasesmovie.com/