Free Will, by William Kitcher
1 She returned home and, as usual, put her keys on the hall table and walked to the back of the house carrying a book she had just bought, to the study, where, as usual, he was sitting at his computer, writing. He turned and smiled, and went back to his writing. She kissed him on the top of his head, squeezed his shoulders lightly, then flopped onto the sofa. He looked at her again, and smiled with recognition at…