It wasn’t even specifically sexual, the charge between them, though that was part of it; it was something more storied and time-tested, the glow of two people who’d chosen to go through life together, who’d figured out how to navigate the shared space of a marriage, the rules of bathroom doors and breathing room and honey could you take a look I’ve got this weird thing going on with one of my molars. “How many years, darling?” Helen asked. “Thirty-five? Thirty-six?”