He could feel her knees weakening, and he'd be lying if he claimed her nails to his forehead wasn't uncomfortable... But the noises she was making, the look of her leaned back against the wall like this, the way her face looked when he glanced up through his eyelashes...it was more than enough to keep going.
Teasing her mercilessly, he brought his hand up between her legs, slipping a finger inside her, feeling just how wet she was. The knowledge alone was enough to make his cock twitch with eagerness and he knew he should probably get on with things sooner rather than later.