Beckett closes her eyes, willing her breathing to steady, concentrating on the simple act of inhale/exhale, the repetition of something so simple even as she senses the anticipation and the slow burning of the heat between her legs. It's impossible for her to hide, spread open before him as she is, as exposed literally as she was emotionally mere moments before.

It's close to overwhelming, but she focuses on him and what he's doing and how it feels - and God, does it feel good, even the slightest of touches at the curvature where her leg joins to her hip.

Her eyes fly open when he utters her name.

"Castle?"