Severus lay on the bed, one arm draped lazily over Lupin's chest, which was heaving slightly, heavy with sleep. Looking down into the serene face, Snape smiled to himself. A quiet, contented smile, such as he had never experienced before, as never before had he felt so complete, so totally at ease.
Lifting one hand, he gently brushed aside a stray strand of hair that had fallen over his lover's eyes, with such a care and tenderness that even he didn't realise he possessed. He lay there for a few moments, allowing the silky strands that were flecked with grey to fall through his fingers like the sands of time through an hourglass. All that existed was this moment - this single, perfect moment.
Bending his head, he slowly brought his lips to Lupin's, which were parted slightly as if in silent invitation, and brushed them with the gentlest of feather light kisses. Allowing them to linger there for a few, sweet moments, Severus reluctantly, pulled back and lay his head back down on the pillow.
Snuggling close to Lupin, he closed his eyes and prepared to sleep. "I love you," he whispered softly as consciousness slowly left him.
Beside him, Lupin slowly opened his eyes, and smiled into the darkness.