It had long been established that for the set of personality traits the captive presented, the best results would be achieved if she was allowed to exercise some choice regarding her enslavement, albeit limited to alternatives that coincided with the objective of preparing her for her new station in life. Thus, her own choices and deepest desires established a baseline for her future role, ensuring that she would eventually realize her full potential. Without further ado, the metal implemented the measures that would put the subject into the appropriate state of mind.
'Oh no, what now?' Lin was shaken from her stupor when a thick strand of the metal shot upwards and wrapped itself around a stout branch that arched over the trail. Once securely anchored, the strand contracted and Lin was hoisted feet first up into the air until she found herself dangling upside-down about a meter above the ground. It was an awkward position to have to endure, yet due to her excellent circulation (and probably the metal's meddling), she felt no ill effects at all. Hence, she suffered it uncomplainingly and only groaned when the insidious assault on her erogenous zones resumed, this time mixing pleasurable and painful stimulation in equal measure.
The preceding orgasms had left her satiated, drained and exhausted, hence she did not believe she would be up for another round, yet to her surprise, she soon found herself becoming wet again. Her body had already been conditioned to respond indiscriminately to the metal's manipulation with arousal, regardless of whether her mind tried to tell it otherwise. Besides, her earlier mortal fear had given way to the titillating thrill of the unknown: The prospect of having to submit to a formidable, alien Mistress excited her like nothing before in her life and if her adventure up to now hinted at what her future with Mistress would be like she wanted to sample its pleasures with an absoluteness that left no room for doubt. And she wanted so much more of it! However, the metal had changed tactics once again, as she soon realized to her chagrin.
Instead of continuously ramping up the intensity of its harsh fondling, the metal kept her lust simmering on a level too acute to endure but backed off the moment an orgasm approached. Every time this happened, Lin howled with frustrated need into her gag. With each new round of this awful game, the unbearable tension was ratcheted up another notch until she felt she must surely burst.
Once more the vicious cycle started, her pussy, breasts and every other erogenous zone she possessed was exposed to a continuously stepped-up whirlwind of sensations, varying between tender caresses and nasty shocks, yet each perfectly attuned to whatever desire her brain telegraphed to her wily tormentor. In record time, Lin was once again shuddering with pleasure in her restraints. She was a hair's breadths away from exploding into a spectacular orgasm when every stimulation suddenly ceased and she was left high and dry for the umpteenth time.
'No, no, not again!' She had been so damned close! It was grossly unfair to be denied again and again. In a fit of temper, Lin bucked and strained with all her strength against the bonds that held her arms uselessly at her sides, desperately attempting to somehow reach her crotch. If bone and sinew had been up to the task, she would surely have ripped the strands of metal apart, but so all she achieved was a totally ineffectual rocking movement that mocked her titanic effort. Beside herself with rage, she screeched at the top of her lungs, yet even her scream was effortlessly muffled by the lump in her mouth, leaving Lin at her wit's end, frantic with unfulfilled lust. Then it got even worse.
The metal had learned an impressive new trick and the next time she was at the brink of what promised to be the greatest orgasm of her life, it held her there, twitching and moaning, but unable to find the release she desperately craved. She absolutely needed to climax, yet could not! When, after interminable minutes, the metal finally released its hold of her mind and allowed her raging libido to subside a little, Lin was a sobbing wreck. She would do whatever it took to be granted her climax! Whatever was required of her, she would gladly agree if only it ended this erotic torment. Suddenly, she knew this thought was, in fact, the key to her salvation.
Her Goddess had graciously accepted the gift she had made of her lust and pain. Now it was up to her to demonstrate her unconditional surrender to the Mistress' dominance. Now she had to turn herself into the slave she had dreamed of becoming for so long so that she might be rewarded with the boon she craved. The Goddess' metal minion had been tasked to put its considerable means at her disposal to help with her transformation.
In Lin's mind formed a surprisingly detailed image of how she currently looked: Dangling upside-down from a tree, flushed and panting from exertion, her blonde hair matted and disheveled, her running outfit stained and soaked with sweat. Her bondage was more cumbersome than tantalizing and apart from her upside-down configuration far less challenging than the positions she regularly attempted on her own. In addition, it gave her the aspect of a sausage caught in netting, like a salami hanging in the pantry - this would not do. Like, not at all! So in her mind's eye, she began to make changes and the metal dutifully implemented them in reality.
First, she decided that a proper slave needed to be naked. The metal made short work of her clothes and shoes, forming blades that shredded them to small pieces that rained down on the forest floor below. She critically surveyed her now exposed body. Normally, she shaved regularly, but since she was staying alone in a remote place, she had foregone the routine for the past week and some stubble had accumulated at her crotch, legs, and armpits. Somehow she knew that the metal could take care of that, once and for all. Before she had even consciously formulated the thought, an army of silvery blobs crawled all over her, excising all body hair below her neck and also completely eradicating the follicles at the same time. Still brimming with pleasure, Lin did not mind the discomfort that accompanied her permanent depilation. Besides, the entire process took only a few minutes and when done, her skin appeared smoother than it had been since she was a baby.
Encouraged by this success, she proceeded without pause to have other flaws corrected that conflicted with her idea of a perfect body. Before long, her few moles, an in hindsight rather embarrassing tattoo on her ankle and the scar on the back of her hand that attested to a conflict of opinion with the late family cat were gone forever. Unfortunately, nothing could be done about her boring blue eyes; while such changes were possible in principle, they required gene editing beyond what the metal could accomplish on short notice. On the other hand, it excelled in modifications of a more surgical nature and was able to speed up the healing process miraculously.
Contemplating her newly unblemished body, Lin experienced a moment of bliss. The metal rewarded her with another burst of teasing that made her pelvic muscles twitch around the intruders stuffing her, but it ended before she was pushed over the edge. She willed the metal minion to continue or at least free her arms to let her engage in some old-fashioned masturbation, but her request was denied. Obviously, the sway she held over it was strictly limited, so she had no way out but to keep calm and carry on by directing her attention towards her bondage.