LET’S say you have what you believe to be a healthy marriage. You’re still friends and lovers after spending more than half of your lives together. The dreams you set out to achieve in your 20s — gazing into each other’s eyes in candlelit city bistros when you were single and skinny — have for the most part come true.

Two decades later you have the 20 acres of land, the farmhouse, the children, the dogs and horses. You’re the parents you said you would be, full of love and guidance. You’ve done it all: Disneyland, camping, Hawaii, Mexico, city living, stargazing.

Sure, you have your marital issues, but on the whole you feel so self-satisfied about how things have worked out that you would never, in your wildest nightmares, think you would hear these words from your husband one fine summer day: “I don’t love you anymore. I’m not sure I ever did. I’m moving out. The kids will understand. They’ll want me to be happy.”

But wait. This isn’t the divorce story you think it is. Neither is it a begging-him-to-stay story. It’s a story about hearing your husband say “I don’t love you anymore” and deciding not to believe him. And what can happen as a result.