Left to their own devices, the duo’s lilting sibling harmonies and Nerissa’s intelligent songwriting keep the sisters anchored in the familiar territory of searching folk-pop ballads and midlife laments such as “Yesterday’s Girl,” “The Sweetness,” “All These Years,” and the title tune. Yet they also slip into a delightful, Yankee-inflected country mode on cuts like the honky-tonkish “Love Me One More Time” and the twangy “He Loves the Road.”