"I don't know," he said, and reached up to tweak the white flower she'd tucked into her hair. He didn't know what it was, but it smelled nice. "Don't have the faintest idea, Mrs. Dr. Zimmerman."

Okay, so he didn't know whether she was going to go by his name or whether she was doing the hyphen thing (Magnus-Zimmerman was just a mouthful) or whether she'd keep her own name. Regardless, she'd probably always be Magnus to him. Just because. But she could be Mrs. Dr. Zimmerman for this one day.