Minor critiques aside, the way he thrusts against her grip and struggles to keep his eyes open, shows how much he is enjoying what she's doing.
One hand moves lightly, gently, down to rest at the base, squeezing and moving her hand just enough to encourage the thrusts but not the full movement that would be less without lubrication. Her eyes find his and then look down over the space between their bodies. Her free hand slips into her underwear and finds the part that he left very, very wet. She tries to mimic his actions her body responding, but not with the intensity that he gives to her. When that hand begins to play over him again, she has taken care of his critique.
Tongue swirling around his thumb, flicking the tip. Her eyes asking for her reward.
He shudders as she begins to lubricate him, nodding as she expertly finds his favorite places to be touched. When her eyes ask him, he takes his thumb away and hesitates for a moment. Has she truly earned it? He relents, hooking a hand behind her head and guiding it downward.
She starts with just her tongue, tasting the mixture of herself on his skin, then adding the pressure of her lips and the intake of her breath on the places that make his toes curl. And then sinking him fully into her mouth, pausing, letting the muscles in her throat contract around his head as her tongue plays with his shaft. Then moving up and down the length of him, tongue flicker light at times, solid pressure at others.
All the while her hips moving, the pleasure she is getting from her actions growing.
As the thrusts grow jerkier, as the pressure on her scalp grows harder. He does as he was bidden: he @#*!s her mouth, using her to bring him pleasure unequaled and loving every second of it. With a final thrust, he is deep in her mouth and only then does he come. He does not have to, but he holds her anyway until she swallows every last bit of him.
Only then will he release her, wrapping her up in exhausted and loving arms.
A quick glance at his face and the smile takes a teasing, impish air which doesn't quite match the languor her happy body.