Many thanks to GTDaytona and VanessaNelson for their editing and hot stories!! ~ Start with chapter 1 ;)
*****
"What's that under the sheet?" Karla asked innocently enough as they perused the sex room.
"That's Otto, my fuck machine," Mei said, and with a flourish, pulled off the sheet revealing the complex device.
Karla was dazed - not by the contraption so much as by Mei Chun. She stood naked, black collar at her neck, pink marks still on her body, standing on her tip toes, beaming like her horse just won the Derby, introducing her to a mechanical fucking machine and expecting Karla to be as excited as she was. 'What kind of nymphomaniac is she?' Karla asked herself. When Mei had said she would schedule a massage with sex three times a week she figured it was just a sort of compliment, the enthusiasm of her first time. Now she knew she had been serious. The dedication Mei had to indulging her libido was dawning on Karla. Mei just couldn't get enough.
"It's..." she started to say, but Mei interrupted her.
"Philip made it for me!" she got on, "See, you sit here and turn these grips to control the speed and these... well, it's amazing. Wanna try?"
Karla thought, or had thought of herself as a sexual adventurer, unafraid of exploring new and sometimes dark regions, even anal once (only once). Tim and she even had handcuffs - but Mei was something else. Mei was playing in a different league.
Karla loved to come and she loved the tender bliss that followed a good orgasm, especially if it was shared with a lover. Mei, however, Karla realized, was possessed by her love of sex. Looking at her beaming face she wondered again just who this girl was.
"Get on," Mei said, rising and patting the bench.
"Not now, honey," she said, looking uncomfortable, "I'm good."
"Karla, please honey, get out of the habit of thinking about what you want and start thinking about following direction. You'll find so much joy in surrendering."
'Uggh,' she groaned inside, more bullshit, but knew when she decided to come over here that sex was going to be the main feature of the evening. She thought, at worst, she'd get double penetrated by Philip and Mei wearing a strap-on or something like that but getting plugged by a machine was not what she had in mind.
"On you go," Mei prodded.
'Time to decide,' she thought, 'mollify Mei Chun or walk out,' and there was no way she was walking out. She decided getting reamed by the machine might not be so bad. She reluctantly disrobed, threw her leg over the bench and settled in. She felt a bit queasy as Mei walked behind her and began buckling her into straps that held her shoulders back.
"You're going to love this," Mei promised.
Karla's skepticism grew, and she felt the uncomfortable loss of control like a cold, clammy breeze as Mei bound her. The straps over her waist pressed her down into the bench, the ones over her thighs kept her from wiggling her hips, and the ones over her torso kept her from moving forward.
'Trust is important,' she told herself as a way to calm her nerves. She wanted to demonstrate her trust in Mei as Mei had with her. 'Maybe this is like those team building exercises we did at the student government retreat back in school,' she thought.
Maybe being tied to this thing was a way to firm up their relationship. That letting Mei work out her kink on her was a way to cement Mei's affection — in a sick, twisted slut kind of way.
'It won't be so bad,' she reasoned. 'She won't go overboard. Right?'
Finished with the torso straps, Mei came around to her front; the excitement shone in her eyes and in the smile on her face as she cinched the ankle straps tight.
With her all buckled up Mei threw the switch, then realized she'd forgotten the lube. A quick brush of Karla's labia felt dry so she got up, found the liquid lube on the table and knelt down. She pointed it up and squirted the bottle like it was lighter fluid on coals. It sputtered and coughed with lewd noises as it emptied.
She sat back down.
"Ok, all lubed up and ready to go!" She loved the look of hesitation in Karla's eye, the half trust and skepticism. She leant forward and prepared to guide the wet dildo inside of Karla's body.
"You're gonna love it," she said again, turned the grip with one hand and felt the cock move with the other. She guided it in and Karla began huffing in response to the growing feeling of being stuffed.
It struck Karla at that point that Mei was damaged, injured and not a whole person. This was a very intimate moment but Mei had just introduced a pound of rubber cock into her body with no more than a, 'You're gonna love it.' Thinking back to earlier in the evening, it occurred to her how impersonal the sex had been then as well. There had been moments of tenderness, but nothing like their times in the massage room.
"Ready for the ride of your life?" Mei said, feeling the shaft reach the top, pause slightly and descend. Karla saw the glint in her eyes and their corners crinkle a bit. She tried to smile but it felt like a grimace.
'Mei is half a person. She's... it's like...' That was as far as she got before the cock pushed the thought from her mind.
"Oh!" her gasp sounded like a hiccup with the impact to her cervix, "it's really big."
Mei climbed off, got the handcuffs and secured one wrist. Karla struggled, "No, Mei... I..."
Mei grabbed her free arm. "Karla," she pulled her hair a little to get her attention. "You're mine. If you don't like it, I'll let you go but please enjoy submission for a while."
'Maybe by giving myself to her like this I can understand who she is?' Karla thought with hope. She relented, relaxed her arm and let Mei take her unbraceleted wrist even though she felt the intensifying weight of panic pressing in on her. As the sound of steel ratcheted behind her back the meaning of 'let you go' sunk in.
"Ok, but don't hurt me or put that ball in my mouth."
"Oh... right. Now you are giving me ideas. You're warming up to this already."
"No, I didn't mean it that way."
The machine was on its lowest setting, the cock crawling into her a millimeter at a time, the motor purring with potential energy. Karla could mostly ignore the oversized invader until it hit home.
She watched Mei walk off out of her sight and return with two glass bells, one on each of two fingers on her right hand. The tapping of them together made a clinking sound.
"One part of your mind did, Karla. We'll see how it goes." She had real fear in her eyes when Mei looked deep within them. "Perhaps there is a secret you're hiding inside. Maybe you're more like me than you think. Sick, twisted slut sound about right?"
Karla didn't answer. Her attention was taken by the glass things on Mei's fingers. "What are... Ohhh-mmm," Karla interrupted herself with a sort of shivering moan when the dildo rose, pressed and pushed on her most tender internal mass. It felt like it, if it went a millimeter further, was going to skewer her and lift her off the seat. "Ugh. What are those?"
"They suck your nipples. He didn't use them on me yet but he showed me how they work."
