YOUR SISTER’S SISTER (Lynn Shelton). See times. Rating: NNNN

Humpday director Lynn Shelton returns with another largely improvised study of 30-somethings at a point of crisis, this one centred on a grieving man (Mark Duplass) who finds himself trapped at a summer cottage with the sister (Rosemarie DeWitt) of his best friend (Emily Blunt) for a very eventful weekend.

Efficiently establishing that each character is keeping at least one secret from the others, Shelton lets the tension and awkward comic fumbling flow freely. All three of her actors adroitly dance on the edge of farce while keeping the drama at believably real levels.

It’s rare to see a movie that throws around this much raw emotion and still gets laughs.