"Regenerate?" Kitty cocked her head, curiosity painting a brightness in her eyes that she certainly didn't feel today. "How do you do that?" He was a scientific puzzle, and on a day like today, she could use one.

Whoa. That wasn't cool. Treating him like a science project. She blushed and ducked his gaze. "I throw myself into science whenever I'm upset. I'm so sorry."