Kitty popped up from the ground in front of him, phasing her hand directly into his chest, her hand around his heart. She could kill him like this. She could also lose her hand like this. That wouldn't end very well for him, either.

It was enough to get him to stop, at least. When your first love turned best friend was willing to kill you, it tended to put things on hold.

"Don't make me," Kitty said, for her sake as much as his.