Treem unwinds a story you can’t shake, especially once the small cast in the Keegan Theatre production starts working the angles and attitudes of Treem’s increasingly interesting characters. … Treem follows her knack for honest complexity right to the finish. Marie Byrd Sproul directs the show without undue fuss as Agnes bakes, Penny studies and Mary Anne guzzles whiskey; there’s a twist near the end, and a tone shift that makes you feel better than you would have guessed. You leave thinking about Treem’s knotty, badly treated women — but also about how intuitively she unspools a tale.