Oh- That's... new, isn't it? Otto's pretty sure that's new. He'd remember if he'd been called 'honey' before now. There's a split second, just the briefest flash, where he thinks of Rosie. Then it's quickly suppressed again. His widened eyes blink rapidly, only to ease back into their usual gaze.

He's not opposed to it, he thinks. In fact, he likes it. So he swallows down his apprehension and returns the gesture.

"... I'll see you there, honey."