Mark glanced over his shoulder at Abby. She rode Rosemary at a sedate pace while he rode Samson. Despite her initial trepidation, Abby had embraced horseback riding. In fact, she looked like she was enjoying herself. Rosemary was an easy ride and didn't mind novices. Unlike Samson, who had the attention span of a gnat, Rosemary tended to plod along on one path and never detour. Mark kept an eye out for snakes, holding Samson’s reins more tightly than usual. He still couldn't believe Abby had stayed, and because she'd wanted to learn horseback riding. What kind of a reason was that? Maybe he'd finally driven her to the brink of insanity. But she didn't look insane as she leaned over to pet Rosemary's mane. And he didn't imagine the way her eyes gleamed whenever they made eye contact. He