"You told me I could tease you for being adorable so I am. No takebacksies, dude." Tony is starting to curl in on himself in minute ways that Cap will know means the end is near. Even he can't bicker forever after days with no sleep. "So stay out of my corners. I need those to remain... un-terrifying." It's punctuated by a huge yawn against Steve's shirt, never once opening his eyes.