My ex-mother-in-law, Elora, was always kind to me. Even after my marriage fell apartThat’s the first thing you need to know about her. Some women lose a son’s marriage and decide the wife was the problem. Elora Whitaker never did that. Not once.Five years ago, I divorced her son, Shane, after I found out he’d been having an affair.It wasn’t dramatic. There was no screaming in the driveway, no thrown dishes. I found a receipt in the pocket of his work jacket when I was doing laundry. Dinner for two at a steakhouse in downtown Grand Rapids on a night he’d told me he was at a job site in Holland.