Dennis Hummer, now 45, met Nancy Hess, now 53, working at a church camp in 1988. Over 18 years of marriage, they learned they wanted to spend their time differently from each other. They divorced after Ms. Hess fell for another man. The couple did not have children, but now Mr. Hummer, who remarried and is now stepfather to two girls, find he loves being a “bonus” dad….
