It's not that she's a perfectionist when it comes to sex, but the first out of synch movements are frustrating enough to pull a whine out of her. It might have more to do with want, and urgency, because it gets easily placated by the rhythm being found.

It feels so good. He asked her to ride the fuck out of him - and here, she's a guest in his home, how could she refuse him the favour - so she does. Brings her hands to grab onto his hips for balance and meets his hips, thrust for thrust, with enough enthusiasm that skin slaps against skin at a point.

Then he lurges upwards; they kiss, and she loses track of time again, in responding to the kiss. By the end of it, when she's breathless enough to put a few inches of distance and gasp for air, he's got a hand on her breast, she's got hers messing up his hair again, and they've changed the rhythm again. Slow, agonising and teasingly slow rolls of her hips, to feel his cock fully inside her, to let him feel her flutter and clamp around him when she grinds against him just so, just at the right angle to press against her clit too.