HEIDI had a rich fantasy life, Aaron discovered after they married. ‘I’ve got you a fireman’s outfit,’ she said, giving him a lascivious wink. Where did this come from, he wondered. But he happily went along with it and that night, after he rescued her, she thanked him with gusto. Over following nights he was, by turns, a policeman, a soldier, a stripper. But then it got weird. ‘You’re a priest,’ she said. ‘A mortician.’ ‘An accountant.’ Then: ‘You’re my ex—Brad!’ Aaron played along gamely, but he was beginning to take much less pleasure in Heidi’s cries of ecstasy.