A Spool of Blue Thread: A Novel by Anne Tyler:
Red told his sons that he’d heard somewhere that after a man’s wife dies, he should switch to her side of the bed. Then he’d be less likely to reach out for her in the night by mistake. “I’ve been experimenting with that,” he told them.
“How’s it working?” Denny asked.
“Not so very well, so far. Seems like even when I’m asleep, I keep remembering she’s not there.”