She slipped into his bedroom while he was sleeping, quietly sneaking downstairs from the spare room so as not to wake the rest of the household. He was lying peacefully on his side, snoring gently as she lifted the covers, and after first slipping off her T-shirt nightie, slid alongside his prone body. The cold English climate made the whole house very chilly at night, and even this brief excursion down the stairs was enough for her to be shivering by the time she had the duvet back over her.
She snuggled up to him for warmth, pressing her breasts firmly into his back and moulding her legs along the back of his. After a few moments, she was frustrated by the T-shirt and PJ trousers that he was wearing - she wanted to feel his skin against hers and share all of his warmth. Taking the T-shirt off without waking him looked impossible, but the trousers were a simple elasticated affair and she managed to slide them down his legs with minimal fuss and only a slight stir and murmur from him. Returning to her former spoon position, the only item of clothing between her legs and his was the black satin g-string that she still wore - warmth quickly returned to her body.
After a few minutes of trying to sleep, she decided that she was happier just to lie with him than to try and doze off. Wicked thoughts went through her mind and her right hand slid delicately over his now bare hip and touched his pubic hair and penis. Her fingers curled around his length, holding his flaccid dick into an almost erect position. The warmth of his skin was intense to her touch and she slowly began to stroke his length, feeling a gentle swelling with each caress.
His dick grew in her hand, accompanied by the occasional groan and a slight quickening of the still sleeping figure's breath. When he was at full length, her hand's pace quickened - the pace of his breath could be matched to the speed she chose to stroke at. Three times she brought him close to the end; the warm body next to hers tensing as he nearly came, before she eased off her pace and left him come back from the edge.
Finally, stroking the exposed tender flesh under his foreskin delicately, he came in a huge surge, covering her hand in his warm juices. She moved her soaked hand to her mouth and tasted his cum - warm and slightly salty, she cleaned her whole hand before returning it to her original hold and dozing off to his deepened rhythmic snoring.
He woke to feel an unexpected person in his bed - she had obviously missed him during the night and come down to be with him. The cold sticky feeling at his crotch made him realise she had done more than miss him and his fingers intertwined with those still holding his now flaccid cock. She was sleeping like a baby behind him, her bust pressed firmly to his back and her head cocked up onto his shoulder. Even with him interlocking his fingers into hers, she stirred not one bit.