One year after my mother-in-law's death, my husband asks that we move in with his father. Both men are kind, and life should be comfortable, but my busy husband's halfhearted lovemaking leaves me unsatisfied—and increasingly conscious of my father-in-law. One night after sex with my husband, I go to the kitchen for water, trying to calm my still-aching desire. My father-in-law approaches from behind. Having listened to us through the wall, he recognizes my frustration and attacks me...