Sex in the 60’s

My wife of 30 years and I are in our 60s. A few years ago she asked that we no longer engage in sex. “It’s not such a big deal anymore,” she said. She would not see a doctor or consider other help. I began an affair with a widow. Recently my wife found out and went ballistic. If she can casually renounce sex, can’t I seek it elsewhere? — name withheld, Massachusetts

The State Of . . . Sex as an advanced adult. What would you do?