Not even in the womb? Strict rule - though Tony knew Pepper was well aware of the fact that once he attached a nickname to someone, it usually stuck around. But he couldn't even bring himself to pout about it - the thrill of even having another child to name kept his grin firmly in place.

He was silent for a moment, feeling the rise and fall of her breathing as he thought about what awaited beneath their hands, so infinitesimally small at that moment but infinitely important.

"Alright. Rain check on names. Besides, I'd hate for Sue to think she's not the only Optimus Prime in my heart."