If Woody Allen had been a woman born and raised in the Great Damp of the Pacific Northwest, Lynn Shelton might have been his name. Your Sister’s Sister warms the comedic cockles through sharp, largely improvised dialogue and quirky emotional connection among three not-quite-grown-up 30-somethings (Mark Duplass, Emily Blunt, Rosemarie DeWitt), friends, relations and lovers who accidentally come to share a cabin in the woods for a week or so.
This crowd-pleasing chamber dramedy, Shelton’s first film since Humpday (2009), takes all the time it needs—suffering a bit of narrative sag in its middle—to reveal “family” secrets and resolve a Shakespeare-lite comedy of errors, while meandering toward sort-of reunion. (Trust me, Duplass was born to play Shakespeare’s Bottom.) Funny, confessional talk among folks whose suffering is mostly manageable builds a glow as fragile and transitory as midsummer fireflies, putting you in the mood to be forgiving when spontaneity goes south in favor of an unconvincing, hippie-dippy finish.