[Now that she's slowing down for him, it's clear he's already panting and worn out... but he neither nods nor shakes his head in response, instead just shutting his eyes and leaning his head back against the sofa for a moment.
Just a moment, as he thinks of how to explain his thoughts.]

... I...
Don't know.

[His grip on her thighs goes firm, now, to try and still her completely. ... With himself still inside her, of course.
But it's a gentle "okay, stop, let's talk".]

- Something about hearing it after everything I have done feels... strange.
This is not something I've ever felt before - like something in my chest has been wrapped in thorns and vines, tugging tight just hearing you moan like that...