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The shop was a tiny hole in the wall, and it contained things Saber had never imagined. Being summoned as a Servant meant that she had been given knowledge sufficient to make her way in this unfamiliar environment - information about motor vehicles, about firearms, about a world far broader than the one she had lived and died in centuries before - but it had not seen fit to convey the intimate knowledge of lingerie.
"Do you like this one?" Irisviel asked, holding up a white confection of lace and ribbons.
"It seems impractical," Saber told her honestly.
"It's not supposed to be practical," Irisviel said with a grin. "It's supposed to be pretty." She held it up against her body, turning towards the mirror, trying to envision how it might look. Saber, inevitably, was also unable to avoid imagining how it might look on her, how the sheer fabric would only half-conceal her body, and how the lace would cling to the curves of her breasts... She swallowed hard and tried to compose herself, forcing her eyes straight ahead.
"What about this one?" Irisviel picked up a shiny black set. "Maybe this is more your taste?"
"But it's not for me," Saber protested. "You should get what you prefer."
Irisviel smiled playfully. "Who said it was only for me?"
Saber struggled to keep her expression even. "I just assumed... forgive me."
With a girlish giggle, Irisviel leaned in close. "Of course, if you don't want to try anything on, I won't command you to do it. But I thought it might be fun. I've never had the chance to go shopping for this sort of thing before - especially not with a girlfriend."
Soon she had an armful of different ensembles, and the elderly woman at the counter had shown them into a small room at the back where they could try things on. Irisviel didn't hesitate to strip off her outer clothing, while Saber stood nervously against the wall in her suit and looked everywhere but at her.
"Saber, look at this one, isn't it pretty?" Irisviel did a little twirl, so that the short négligée spun out, revealing her legs. It was ivory, trimmed with lace, and sheer enough that Saber could see her nipples through the fabric. She tried to avoid looking any lower than that.
"You look beautiful, Irisviel," she said truthfully, keeping her gaze fixed on the ceiling. This was her charge, a married woman, the wife of her master. How could she contemplate her with desire in her heart? She would be no better than Lancelot in such a situation, if she was to acknowledge, let alone act on, any of her feelings. But she couldn't deny that Irisviel was beautiful, and she couldn't lie to her because that would cause her pain.
"Now you try this one, if you like!" she said, holding out the black satin bra. Saber took it gingerly, and turned around to try and preserve a bit of modesty while undressing. Of course, it was impossible - the room was not large, and the mirror on the wall let her reflection be seen despite her efforts. Irisviel was watching with obvious glee. Saber put the bra on and Irisviel approached to help her fasten it after watching her struggle for a minute or two. "Here, like this," she said, clasping the device for her. "You look amazing. Here, put your jacket back on with it!"
Saber didn't see what the point was, but she shrugged the suit jacket back on with just the black bra beneath. When she looked in the mirror, she had to admit the effect was striking. Even more striking was the gleam in Irisviel's eyes.
"Come on," she said, looking excited, pulling the tags off of the clothing. "I'll put my coat on, and you button your jacket, and we'll go pay." She stuffed her clothes and Saber's top into the bag she was carrying before Saber could protest, and wrapped her winter coat around her, concealing the lacy lingerie. Saber followed her uncertainly - surely this wouldn't be allowed? But the old woman at the counter barely batted an eyelash as Irisviel paid for the items with a handful of torn-off tags, and soon they were back in the car, Irisviel laughing as she slid into the driver's seat and Saber's heart racing with excitement despite her better judgement.
Then, to her surprise, Irisviel leaned over and kissed her. Her lips were soft but eagerly parted. "I'm sorry," she said, when she drew back , looking up at Saber through pale eyelashes. "I got so excited I couldn't stop myself. Was that wrong of me?"
"You have a husband," Saber said, trying not to let her regret show. "You wouldn't wish to hurt him, would you?"
"Oh!" Irisviel exclaimed. "But this wouldn't hurt him. He wants me to have this chance to experience the world, even if it's only for a few days. I think if he knew, he'd be happy that we had some fun before... before it all comes to an end. Anyway," she added, flipping her long, white hair back over her shoulder, "he and Maiya have sex, and it doesn't bother me, so why should he care about what I do with you? I'm just glad he has someone else to look out for him, someone who would protect him with her life - like you would for me, my knight."
Saber's face flushed as she tried to process what Irisviel was saying. Kiritsugu had another lover, and his wife didn't mind? Did the vows of marriage no longer carry any weight in this modern world, or was it something unique to these two and their strange partnership? Mortal hearts were so difficult to understand. Yet she couldn't deny that she desired Irisviel, or that what she said about them only having a limited time together was likely true. She had been summoned for one purpose, much as Irisviel had been created to fulfill that same goal. Soon the war would begin, if it hadn't already, and then anything might happen. "My lady," she murmured, "I am yours to command."
Irisviel drove like she had no time to lose, as though she needed to get back to their quarters before some unknown deadline, or else there would be dire consequences. Saber could only hold on and hope they'd arrive back at the Einzbern manor house in one piece.
As they entered the vast building, it was quiet. If Kiritsugu or Maiya were inside, they were nowhere to be seen. The empty stillness of the hall was broken by Irisviel's laughter, a high, joyful, almost brittle sound, as she spun in a circle, letting her coat flare open to show the lace undergarments beneath. "Come with me," she said, taking Saber's hand and pulling her along behind her.
By the time they reached one of the many bedrooms on the top floor of the mansion, Irisviel was rosy and she was a little out of breath. Saber followed her into the room nervously, but the door had barely shut behind them when Irisviel was kissing her again, this time more deeply and more insistently. She pulled Saber's suit jacket open with a yank, sending the button flying across the room as the thread holding it snapped. Then her hands were gliding over Saber's bared skin, sending shivers up her spine. Saber couldn't help moaning against her parted lips, a soft, stifled sound, tugging at her coat to get it off as well.
Irisviel continued to lead the way, all but dragging her over to the bed once they were down to nothing but their undergarments. Saber knelt at her feet, kissing the creamy, tender thighs that peeked out beneath the frill of lace. With a smile, Irisviel reached down to stroke her hair, brushing a few stray strands back from her face. "My beautiful, loyal knight," she murmured, and then parted her legs. Under the negligée, she had no panties on, and her lips glistened with excitement. Saber couldn't tear her eyes away, and when Irisviel gently guided her closer, she steeled herself and tried not to tremble or give away her nerves. But she must not have succeeded, because Irisviel paused, gazing down at her. "Have you ever done this before?"
"Never," Saber whispered, embarrassed. It wasn't as though she had ever had a normal relationship with another person - even her marriage to her wife had been a chaste one. She knew something of the nature of sex, and certainly she could recognize desire for what it was and give herself free rein to follow her urges, but that didn't impart any skill to her.
Irisviel smiled sweetly, not seeming disappointed or upset in the slightest. "Then lick me, just here," she said, spreading herself open, and showed her what to do. Saber was tentative at first, but the taste of her was so wonderful, and the little sighs and coos she made provided encouragement for her to delve deeper. Irisviel draped her legs over Saber's shoulders, lying back on the bed with a moan, her arms spread wide. "That's it, ohh, Saber, yes!" Saber licked her until her jaw was sore, until her face was coated in slick juice, until Irisviel's legs trembled and her hips bucked involuntarily and the little whimpers she made grew more frantic and desperate. When she came, it was a moment that felt too short and infinitely long, all at once.
Soon she drew Saber up onto the bed, still shivering with every touch, and guided her to lie down. Irisviel lay on top of her, her long pale hair surrounding them like curtains, and began to playfully rub the hard point of Saber's nipples through the black satin bra. Saber sucked in a sharp breath as Irisviel lowered her lips to one of them, sucking it through the delicate fabric until it felt swollen and almost sore, then did the same to the other. "Let me take it off," she begged, as Irisviel tugged the straps down impatiently, until her breasts spilled half-out of the cups and she could kiss and suck freely at her newly-exposed nipples.
Saber's skin felt like it was glowing from within, the embers of a fire she had long thought extinguished flaring back to life. With some struggle, she managed at last to remove the bra, tossing it aside and giving Irisviel better access to her breasts. She wondered, in a daze, if she could come from just this alone. But Irisviel had other ideas, and once she had Saber undressed, she slid her hand between her legs, clever fingers teasing her open. Saber couldn't hold back a cry as Irisviel's fingers circled her clit, darting down to glide inside her and then, teasingly, drawing back again. It was like a rising flood, the wave cresting up against her and then receding, over and over. Again and again Irisviel tormented her gently, drawing out the pleasure as long as she could, dipping her head down to kiss Saber's breasts, sucking fierce little bruises onto her pale skin, before popping back up again with a knowing smile. Soon Saber hardly knew what she needed, only that she needed more of it. "More," she begged, and Irisviel seemed to understand her helpless plea. Thrusting two fingers into Saber, she kept rubbing her clit with her thumb. The next time Saber felt the wave about to crest, she didn't try to hold it back, letting it wash over her and carry her to some unknown shore.
Afterwards Irisviel gave a contented sigh and Saber encircled her in her arms, keeping her close for as long as she could. It wouldn't last forever, but then, nothing ever did. Saber tried not to think about what would happen if they won, any more than she could bear to dwell on what might happen if they were defeated. All she could do for her fair, false mistress was keep back the outside world for a few more hours, one more night at the most, before the battle would begin that would ultimately tear them apart.