The seal around her nipple isn't perfect and, through it, Castle's soft groan spreads out over her skin. He draws his lips to a punctuation point, tongue skimming apologetically over the place where he had his teeth moments ago. 'Slightest bit of concave pressure hollows his cheeks as he draws a deeper, sweeter taste of her into his mouth. He could spent hours paying her this kind of attention. Getting to know her body, the way it bends and moves, what she likes and doesn't so much, the things that make her weak even when she's lying down.

He rolls his weight onto the opposite elbow, mouth leaving her breast but his thumb there to brush her nipple back to a peak; he touches his lips to the chain around her neck, glancing up to catch her expression.