Okay well that was both kind of a relief and at the same time just made the appearance of this girl just a little bit more strange and random, but sure Tony could roll with it. She was a girl, she was in his hot tub, this was fine - it was practically like old times. He could handle this.
He took her hand when she held it out for him introducing herself as Madison. "Tony Stark," He grinned. "So I guess this makes you new in town then?"
She wasn't any sort of wilting flower by the looks of her, she couldn't have been considering just how easily she stripped out of her clothes and climbed into a hot tub with a complete stranger after all. And the smirk on her face said as much even if the rest hadn't - which it had.
"Oh yeah, I did." He grinned when she asked if he'd built it. "Well kind of?" He paused for a second considering how to explain. "I built it back home, I built my tower first and as the final touch I decided a roof top hot tub was exactly what it needed, and then I woke up this morning and the hot tub from the tower was suddenly attached to my house. It's wild."