It took only one week for Adeline to research the proper ingredients, perfect her technique, and craft the potion to her satisfaction. It turned out to be surprisingly simple, in the long run, considering how overwhelming, blunt and vulgar the result was intended to be. Every hedge witch, alchemist and wise woman worth her salt could make a love philter, to various degrees of potency, although she hadn't had to dirty her hands in such pedestrian magics for quite some time.
Adeline soon discovered that most of the process was intended to carefully dilute the effect. Completely shattering someone's will was easy, compared to inducing just enough of an attraction to seduce your target. It all had to do with a measure of degree.
It was scarcely ten days since she received the king's request that Adeline managed to achieve the desired effect... and per her own safeguards into place to protect herself from the King's predations. Doubtless, he would try to turn Adeline, and bend him to her will in order to protect knowledge of what had been done to him and how. The antidote was as easily crafted, a simple brew to dispel the intoxicating chains the mixture would wrap about a target's mind. Again, any hedge witch could reproduce the effect... if they manage to identify just what form of magic was at play, here.
Pleased with her cunning, she ventured out of her laboratory, situated in one of the lesser keeps of the castle, just long enough to find one of the common maids and send a message to His Grace, inviting him to come see her work for herself.
To the untrained eye, the laboratory appeared much like a kitchen, with dried herbs and jars of strange powders and spices at hand, a cauldron for the fireplace, knives and tools of all sizes about. It was only on close inspection that one would notice the runes inscribed into a blade, the well-worn spell circle cut into a countertop. For Adeline, it had been home for near three-quarters of a century, a place of comfort away from the more populous parts of the castle.
It did not take long for King Roland to arrive, leaving the two black-armoured guards that flanked him outside of Adeline's sanctum. The heavy oaken door, itself subtly inscribed with magical sigils on the inside, slammed shut, leaving the witch and the king alone.
Grinning with pride, Adeline offered the king a glass flask filled with a thick, greyish liquid that smelled powerfully of cloves and spirits. "Your Grace, may I offer you a drink?"she asked, her voice cloying with sweetness.
King Roland silently regarded the flask for a moment, and for a moment Adeline thought that suspicion would get the better of him, and ruin her well-laid plans, the preparations she had made to align with her king's actions. Then, meeting Adeline's eyes, he tipped it to his lips and started drinking, making a momentary noise of disgust at first. However, the taste did not deter him, and soon, he had finished the potion, and put the empty flask down on one of Adeline's counter with an audible click.
"Chalky" he remarked flatly, his voice thick from the drink, "I don't feel any different. Are you certain your potion works, witch?"
Adeline nodded eagerly, with a satisfied look on her face. "You won't feel any different- by design, it changes the quality of your semen." She picked up the flask and gestured with it. "The potion itself is otherwise inert- it does not act upon you so much as transmutate what your royal balls produce. Just as cutting a different length of board does not change the sawmill, the rest of you is unaltered."
King Roland frowned, processing the analogy. "And it functions as I asked?" he said, voice stern.
"Not quite," Adeline said with a small frown, idly playing with the potion bottle, "I came as close as I could. But, please understand, Your Grace, even so this is no less than a miracle of magical ingenuity."
The king folded his arms and leaned against one of the witch's workshop tables. He did not look best pleased and unless Adeline missed her guess he was likely regretting having drank the potion blindly. "Explain," he commanded, in a tone that demanded obedience.
"In exchange for the effects to be permanent, it necessarily functions in a three-step process," Adeline replied, raising three fingers. She lowered one as she continued. "The first time a woman contacts your seed, it induces an immediate reaction. The woman orgasms, then...."
"I do not believe I have trouble with that aspect of sex," the king interrupted, smirking arrogantly, "That additional benefit is unnecessary."
"No, I'm sure you don't, Your Grace," the witch replied, with her own hungry smile, "The orgasm is a side effect of how the potion works upon a woman's mind, and it will trigger the moment any woman touches your semen. It is needed to establish the positive connection to obedience, and make the woman eager to serve. For roughly an hour thereafter, the woman then becomes perfectly compliant with your will, then the effects of the potion wear off."