It wasn’t supposed to be a sister.

In fact, as originally conceived by writer-director Lynn Shelton, “Your Sister’s Sister” could have been titled “Your Sister’s Mother.”

Her new film, opening in limited release Friday (6/15/12), tells the story of a lonely guy who sleeps with his best female friend’s sister without realizing the pair are related. But as Shelton was first presented it, the character was the friend’s mother.

“He met his friend’s mother and slept with her,” Shelton says with a laugh during a telephone interview. “But we thought that would be too Oedipal – to have a mother-daughter love triangle. So we changed it to sisters right away.” (More…)