Almost Through, by Norbert Kovacs

Jamie never imagined that she'd be bored seeing a married man. The risk of discovery and their shared passion had made the relationship like an adventure. She had looked forward to the hastily snatched rendezvous and secret meetings outside town. But now she knew him like a familiar, and they were arranging get-togethers almost on a schedule. The fun in their connection had gone, leaving her unsatisfied and even dismal. She was glad to learn then he might keep away more to be with his wife. Once that happened, she was sure they could become each other's favorite distraction again.