Sheremet, 28, wore his wedding ring Thursday to a Nashville signing for Rimes' new book, "What I Cannot Change," in which she writes: "The hardest part of life [is] forgiving someone for an unjust wrong."
Asked how their marriage is these days, Sheremet told Usmagazine.com, "It's all good."
Rimes, who also wore her wedding ring, was jovial during the signing at Davis-Kidd Booksellers, taking photos with fans and making small talk.
While promoting her book, Rimes has declined to address her affair with Cibrian, 35, but admitted on Monday's "Today" show that she isn't surprised so many people are interested.
"I've grown up in the press my whole life," she said. "I think people are fascinated with my personal life. And I totally get it."
Asked if she sometimes wished she were in a less visible line of work, Rimes laughed.
"Yes," she replied.
After Us Weekly's cover story detailing her affair, Rimes posted the following message on her website: "This is a difficult time for me and my loved ones."
Sheremet then Twittered: "I Love My Wife!!!"