I tried to figure out a way to write the intro to this Mark Duplass Q&A without immediately mentioning the one thing everyone always immediately mentions about Mark Duplass, I really did. But since Mark was nice enough to sit down at an L.A. coffee shop to promote his new movie, Your Sister’s Sister, while his wife was super, totally pregnant — like next-phone-call-rush-to-the-hospital pregnant — it’d seem weird not to mention that one thing: Duplass, the writer/director/actor/producer/slightly derelict husband, who frequently collaborates with his brother Jay, is an extremely adept multitasker. For Sister, a reteam with Lynn Shelton, who directed him in 2009's extreme-bromance Humpday, Duplass mostly worked in front of the camera — although he did come up with the idea for the movie and co-improvised much of its dialogue. He co-stars alongside Rosemarie DeWitt and Emily Blunt as three screwed-up people — two half-sisters and their shaggy-charm pal — working out the particulars of an accidental, unorthodox love triangle. In theaters June 15, it’s the latest addition to Duplass’s impressive collection of quiet, calculatedly uneven, happy-cry indies.