This is an archived article that was published on sltrib.com in 2012, and information in the article may be outdated. It is provided only for personal research purposes and may not be reprinted.

As much as Friday's audience whooped it up over the improvisatory acting antics of Emily Blunt, Rosemarie DeWitt and Mark Duplass in director Lynn Shelton's latest feature "Your Sister's Sister," it was nothing compared to the dropped jaws at film's end.

It would be a shame to disclose full details here. Suffice to say that the ending represents one of the biggest "pregnant pauses" in recent film history. Literally.

For her part, Shelton refused to elaborate on her film's open-ended ending, just as she also refused to disclose the exact location of the film's stunning cabin in the great Northwest.

"Nope, not gonna do it," she said.

Duplass, in almost rote line with his trademark humor, greeted audience questions about the ending with his quick wit. "The answer is, 'I'm not pregnant.'"

Shelton did, however, take time to lavish praise on Sundance for being first on the block to believe in her talent when it welcomed her breakthrough film "Humpday" in 2009, which earned the "Special Jury Prize for Spirit of Independence" and also starred Duplass.

"Your Sister's Sister" premiered at last year's Toronto Film Festival, but Shelton said Sundance made her feel at home. "If Sundance hadn't accepted 'Humpday' three years ago, I wouldn't have made this film," Shelton said. "It's deeply satisfying to be back here, because it's where this film belongs."

—Ben Fulton