[Oh, he doesn't even notice it at first - he's so distracted with coming down from his own orgasm for a moment, the idea that she somehow managed to get out of those bonds without his help doesn't even click.
Not even when he moves to wrap his arms around her properly, bringing them up under her arms instead of wrapped weirdly around her stomach as they had been. Give him a second.]

M-mmm, merci...! I, heh... gotta lotta practice with this stuff, y'know?
Weren't even the scariest I could be - thought about havin' the saws goin', but, y'know...

[That COULD add a bit more danger than she'd have been comfortable with.
And also his dick would be out. He does not want saws going when his dick is out.]