"Oh, please," she said, sticking out her tongue at him (really advertising her maturity, there). He wasn't that old. Older than her, she knew, but he was in amazing shape, as she was quite aware. He couldn't be older than, what? Late thirties? That wasn't bad. Older guys were all mature and distinguished.
It took some effort to behave while he adjusted her posture. Her body moved with his hands as he fine-tuned her stance. She grinned as he commented on his work. "You're not so bad yourself," she said. She dodged out of the way of the kick much easier than she would have before the repositioning. "Dirty old man, my foot."