Please note, this is a first draft so might have some errors etc in it.
She felt him approaching her from behind – as he always did. She was tense with excitement and shaking as he got close enough to touch her. The first touch from him was electric and her skin tingled wherever his fingertips stroked. His lips brushed her neck and she closed her eyes and leaned her head back on his shoulder. His arms snaked around her and folded her into his embrace. His lips were replaced by his teeth on her tender and sensitive neck; the nips were gentle yet insistent. His breath was becoming laboured as his passion rose to match hers and he pressed himself against her. She could feel the hardness of his excitement and she gasped. Her mouth opened to allow her panting breath an escape route and she moaned involuntarily. He stopped nibbling but held his teeth close to her neck, his tongue flicking out between them as he listened to her sighs. She was impatient for him to re-start his seduction but he knew that he was in complete control and he made her wait.
His hand went up to her throat and gently traced from her chin down... the tension was excruciating and almost beyond her endurance. She wanted to take his hands and place one on her breast and the other between her legs but she seemed unable to control her limbs. Her hands and arms were immobile and a fleeting thought crossed her mind “Oh no, not again!”
With that thought now embedded in her mind, his caresses and strokes became more invasive and she still could do nothing but moan her passion. Her mind was screaming her protest but her body, her treacherous and lustful body was urging him on!
As he laid her down and parted her legs she closed her eyes because she did not wish to see the person that was pleasuring her and yet violating her night after night in her dreams. She knew that he was aware that she was protesting inside her mind. He knew that her free will was locked away in the dream-state. He knew and he took full advantage of her instincts to mate.
As he guided his hardness into her, she gasped again for his erection was ice cold, almost painfully so. She could not move her arms to stop him but it seemed that her legs were under no such restrictions; they wrapped themselves around him as he slid his length deep into her. He was the consummate expert in seduction and he controlled himself perfectly. The rhythm was steady but exquisitely slow and she was brought to orgasm incredibly fast. He continued to work his magic upon her and she wrapped her suddenly movable arms around his neck to pull her up close to his body.
The cold of his erection was still disturbing to her inner-mind, she thought that he would have warmed up a little by now, given the amount of bodily fluid that had been released over it but no, he was still unnaturally cold and she was still so very hot and she wanted his coldness to douse the fire between her legs and yet she didn’t!
She came again and hung onto him with arms and legs squeezing his body until her muscles ached. Her head hung down back toward her pillow but still she did not let go.
His rhythm increased in pace and she recognised his build-up. She was still aching for more of his sex and she did not want it to end. Her mating instinct had swamped her free will and it was all but silent as she rode him from underneath, swaying her body in time with his thrusts, her legs bringing her closer as he thrust himself deeper, her arms crushing her breasts into his chest and her fingers entwining themselves in his hair.
As he approached his own orgasm, his body began to change and she knew that he was close. His skin became coarser, as did his hair. She felt as though she had hold of hanks of horse tail rather than the silky smooth hair of her lover.
His skin became scaled and the part of her that was based in reality was repulsed but the dreaming part was striving for one more orgasm before he shot his load and his icy cold semen squirted into her womb.
She acheived her orgasm but it was unsatisfactory, she felt dirty and defiled even as her body was shuddering with ecstacy. Her body was over the throes of passion as she felt the beginning of his. Her arms became weakened and she flopped back onto the bed. Her legs weakened a moment after but he maintained the connection between them as he did indeed let loose his icy semen into her. She shuddered anew as he grunted his pleasure and she was more determined than ever to keep her eyes closed tight against the vision of horror that she knew her dream lover had turned in to.
She turned her head as he planted a kiss on her cheek, his lips were no longer inviting and warm, they were scabbed and cold. He laughed at her grimace and then she knew that he had gone.
Her bed was saturated with sweat and something cold and sticky seeping from between her legs that was the residue of the night’s exertions.
She was repulsed and disgusted and she stripped her bed for the third time that week.