It just slipped out. You hadn't meant for it to, but ... it happened.

He had been scolding you about being too reckless on an assignment, almost getting yourself killed. And it worried him to death. And you just had to roll your eyes.

"So sorry, dad," you said, and then you froze. You freezing made him pause, and you looked at each other with wide eyes.

Did you just call Ghost dad?