A steady stream of contentment flowed through her as she sated in his arms, intoxicated by the post-orgasmic afterglow. He hesitated in putting his arm around her, knowing how sensitive she might be in her current state, but she wrapped it around her shoulder, snuggling up to him, as if to say, "Don't be stupid, Castle." She listened as his heart suddenly slowed, bathing in his warmth, his gentle strength, and his scent, familiar but new. She took in a deep breath and exhaled.
This was perfect and she never wanted to leave. Her head was on his chest and his arm was around her. She was breathing him in, in all his delicious Castleness. She smiled in contentment, closing her eyes.
"I love you," she whispered.
Castle's breath caught for a second; and then, he relaxed. He looked down at her, saw the contented smile, felt her arm wrapped possessively around him and it was plain that she believed it right now. How she would feel in the morning remained to be seen. So, he didn't respond with words, instead opting to press his lips softly against the damp skin of her forehead.
She sighed contentedly at his kiss. She seemed so peaceful in his arms, so at home, that he allowed himself to consider the possibility that perhaps - just perhaps - she really did feel tat way - was at least on her way to feeling that way.
He decided that was enough for now, allowing himself to drift off with her to the kind of solace that only she and sleep could provide.