Housebound Ch. 05

She had a sinking feeling about that, though.

At last, he finished with Amber and hauled her up over his shoulder. Just as Jen expected, he walked her over to the machine, the lights automatically rising to illuminate it as he approached. Jen could hear Amber's gasp of fear as she got her first glimpse of it.

He lowered her onto one side of the beam, straddling it and facing the trunk, and undid her ankles from the hogtie just long enough to lock them again into cuffs at its base. Amber groaned in anger: she was being forced to stand on her tiptoes just to keep her smooth pussy resting lightly on the beam. It was at just the right height so that if she let herself down at all, the studded dildo would start pushing itself into her cunt.

Jen began to struggle desperately as he turned back to pick her up, but there was no escape. He set her down as well and repeated the uncuffing-recuffing procedure; since Jen was actually an inch or so shorter than Amber, it was even harder to stay up and away from the rod, and the beam between their legs was tilted up to press even more against Amber's pussy.

He undid the cuffs behind her back. Jen couldn't help but moan a little with relief as the twisting pressure on her shoulders was relieved, but he immediately wrapped her arms around behind Amber's back and locked the cuffs again, pulling them within inches of each other. He did the same with Amber's wrists, of course, leaving the two girls in a sort of forced embrace. It even had the effect of pulling their hips closer together, which meant that Jen found the bumps on the beam pressing just above and below her clit.

She couldn't help but wonder how long he'd worked on this thing, and how many times he'd tested it. It was an insidiously perfect design for holding two girls together, but she had a feeling this wasn't the worst of it yet.

"Ladies," he smiled, "meet Gemini."

He began to circle them, taking the dangling electrodes and taping them to the same places on each girl's body: her lower back, the curve of her belly at her hip, above and beneath her left breast, on the fluttering pulse at her throat. "These aren't to shock you," he said, not unkindly, when Jen flinched at the cold touch. "You've had enough of that for a little while... they'll be measuring your responses instead. A girl really isn't much more than a bundle of nerves in a tight little package, you know. This machine is designed to find out exactly what happens when you stimulate the important ones."

He winked at Jen, then gave Amber a playful spank on her taut ass. She barely mmphed in response, but to Jen's left, the wall suddenly lit up with an array of green readouts. They must have been coming from a hidden projector somewhere. She couldn't understand most of them, but others were clear: a pulse rate (both pounding), a timer, and--oh God--graphs labelled "Subject 1 Arousal," "Subject 2 Arousal," "Orgasm Count," and "Punishment Grade"...

He pulled a black marker from one pocket, leaned down a little, and wrote "Subject 1" below Jen's belly button. Amber got "Subject 2." "Forgive me," he murmured as he wrote, "but I do occasionally need a little memory aid."

Finished, he straightened and looked them over with an air of satisfaction. "All right, here's how it works," he said. "If either of you relaxes those nice taut legs, the seesaw will press harder against the other girl's pussy. In addition, the machine will detect the imbalance, raise the whole bar half an inch, and begin to fuck the girl who weakened--quite forcefully, I understand."

Jen could feel the blood draining from her face. No, no, no, she thought to herself, he's going to rape us with these things, but of course he wasn't done yet.

"Because you are sluts, obviously, being fucked will cause you to orgasm. Any time one of you succumbs to that urge, the intensity of the stimulation to the other girl will double--so, if you want to show your friend any mercy at all? Don't come... and don't relax." He winked, then gave Jen a gentle nudge at the back of her knee.

To her horror, that leg collapsed under her, dropping her down onto the studded rubber dildo. Amber squeaked as the beam pressed up hard against her pussy, lifting her off her toes for a moment, but Jen cried out through the gag as the thick rod suddenly penetrated several inches into her tight cunt. Embarrassingly, she was almost glad he'd spent so much time tormenting her on the table--it would have been much worse if she hadn't been so wet.

Jen scrambled to regain her footing and push herself off it, forcing herself back up onto her tiptoes and locking her knees straight--but her situation was quickly deteriorating. As if it had sensed the warmth of her body, the rod followed her up, quickly pushing itself just as deep as before, then deeper. Jen was lifted almost off her toes just like Amber had been, gasping as it seemed to probe the depth of her tight and slippery cunt.

After a few breathless seconds, it withdrew. Jen swallowed as she saw that the graph labelled "Subject 1 Arousal" had suddenly risen.

Across from her, Amber was getting her own turn, eyes clenched shut and biting the gag as her dildo gave her a businesslike, very deep thrust. It finally let her down again, and Jen was somehow a little annoyed that "Subject 1 Arousal" wasn't quite as elevated as hers.

"Don't be jealous," he murmured in Jen's ear, reaching around her to take her pert breasts in his hand and roll his thumbs over her nipples. Jen squirmed a little, but in her position there was nothing she could do to get away; her nipples were erect from the cold air down here, and little shocks ran through them as he tugged at them until they were hard as pebbles. Then he reached forward and took two the clamps dangling on chains from the central pole. Jen could do nothing but bite her gag as he carefully tightened them onto her sensitive nipples. Amber got the same treatment, of course, though she struggled more fiercely with no apparent effect. Somehow, Jen was struck by the look of the silver clips, dangling there below the freckles that faded down Amber's chest to her pale breasts and pink nipples. They looked almost like jewelry.

At last, he checked their bindings and electrodes, then stood back to look them over. "You three have fun together," he laughed, watching them struggle. "I'll be back when the experiment has run its course. Remember... don't come." The heavy steel door clicked shut lightly behind him.

Jen was almost hyperventilating with fear, her skin prickling with goosebumps, but then she felt Amber trying to lift her arms behind her. What was she doing? It wasn't like they could pick the handcuff locks. It only became clear when Amber managed to work her hands up behind Jen's head and fumble for the release of her gag. It popped out, finally, and Jen groaned in relief as it dropped to the floor.

She quickly undid Amber's gag as well, and for a moment the two just worked their aching jaws. Standing there across from each other, nude and still bound to "Gemini," Jen had no idea what to say.

The device provided a topic of conversation when it rumbled to life and began to fuck them in earnest.

"Ohmyfuckingchrist," Jen managed as the dildo plunged inside her, deeper than its first experimental probe--and faster. It alternated its thrusts, so first Jen would be lifted up off her toes by the force of it, then Amber, over and over again. The thick shaft was unforgiving, stimulating every inch of her tight cunt as it fucked her with slick, obscene noises. Jen couldn't stand to look over at the graphs again; despite herself, she knew her body was responding to this forceful assault, and that "Subject 1 Arousal" would be climbing.

"J-Jen," Amber whimpered, and Jen saw that her green eyes were squeezing shut, a flush high in her cheeks as she bit her lip and tried to ignore the machine that was insistently fucking her. "I'm still all worked up from--FUCK--from being on that table, you have to distract me, talk to me or something or I'm gonna..." She inhaled sharply and dug her fingers into Jen's skin.

That actually made things much worse for Jen. Trying quickly to stop thinking about the associations with having nails raked down her back, she stuttered, "Look, it could b-be worse, right?--oh fuck, UNGH." She had to pause as the machine decided to try an especially deep thrust that left her suspended in the air for a second. "--Jesus. I mean, okay, I don't even usually come from penetration, do you?"

"Sometimes," Amber admitted. "But you're right--ngh--if he thinks this is going to lead to some kind of endless cycle of orgasms, he must be pretty clueless about..."

Right on cue, a deep vibration began to shake the seesaw, focused on the little bumps just above and below Jen's clit.

"Fuck," Amber said, a despairing little sound, as the machine suddenly switched from alternation to fucking them at precisely the same time.

It was worse than Jen could have imagined. Each girl was lifted up into the air, gasping as the shaft buried itself painfully deep--and as the clamps on their short chains suddenly pulled sharply on their nipples. Just when she thought this position was unbearable, she was dropped down onto the bar, where her clit would be trapped between her body and the thrumming little nodules. Speech was almost out of the question. The two of them could only let out a rhythmic chorus of squeals and strained moans as they were bounced helplessly up and down, a pair of sweaty ragdolls with their own wetness actually puddling between their feet.

Amber had started digging in her nails again, pulling the Asian girl close, but the sharp sensation only stimulated Jen more. Trying not to think about the way Amber's perky little breasts shook with each thrust, she accidentally glanced over at the chart again. Both "Subject 1 Arousal" and "Subject 2 Arousal" were nearly at the top of the vertical axis, and had shaded from green through yellow to red.

"Please, please, please," Amber was begging in a high-pitched voice, but Jen had no idea whether she wanted the machine to stop or pick up its pace. She was having the same issue herself. The rod could thrust inside her with slippery ease now, and she could swear it had started angling forward to rub against her g-spot with each thrust. Sweat dripped down her spine and between her breasts, clinging to the clamps, sliding around the electrodes on her skin and joining the moisture that had already dripped down the shaft of the dildo.

"Jen," cried Amber, and Jen did the only thing she could think to do: she leaned forward and bit Amber's lip, almost hard enough to draw blood, trying to snap her out of it.

Amber's eyes went wide--but the effect was not what Jen had been hoping for. Instead, Amber pressed into the kiss, her whole face flushed red with frustration, embarrassment and arousal, and Jen felt a strange feeling sweeping up from her back through her belly to her throat. This was nothing like when they'd fucked the night before, out of pure need. Amber's lips were full and soft and wet, so different from any guy she'd ever kissed, and for a moment she was so caught up in it that she was able to ignore the thick rubber cock still rapidly fucking her.

Then a buzzer sounded, and Amber came.

Through the haze of forced arousal and dizzying feelings, Jen could almost swear she felt the other girl's orgasm somewhere deep inside. Amber pulled away from the kiss and arched her body, throwing her curly red hair back and opening her mouth in a soundless scream. Her abs went taut and trembled as the machine automatically slowed and fucked her deeper than ever, forcing her to ride out every last wave; Amber's fingers were digging into Jen's hips even harder than before, but all Jen could do was stare, hypnotized by the sight of the other girl.

Both sides of the machine slowed to a stop, and Amber sagged down, panting helplessly. "I'm s-sorry," she mumbled, unable to look Jen in the eye. Head foggy with lust, Jen couldn't figure out what she meant, for a moment.

She glanced over at the graph on the wall. "Subject 2 Arousal" had dropped back into the yellow, but "Subject 1 Arousal" was still in the red. "Orgasm Count" clicked over from 00 to 01. "Punishment Grade" clicked over from 1/1... to 5/1.

Jen's mouth opened helplessly. "No no no no," she managed.

Then the machine restarted.

Amber let out a surprised squeak as a jet of icy-cold lubricant suddenly sprayed the apex of her legs, making her jerk back up onto her tiptoes, but Jen barely noticed. Her dildo had suddenly increased to triple-time, driving into her aching cunt faster than any human could possibly have done. Her toes no longer even brushed the floor; she was simply bounced up and down like a doll, her whole body weight alternately forcing the slippery cock inside her and forcing her clit against the vibrating rod. The effect was none too kind to Amber, who was now getting her pussy smacked with the beam over and over, but Jen had it far worse.

Don't come, she tried to remember, as she heard herself shrieking with the overwhelming sensation. Don't come don't come don't come come come come--

She held out for almost a full minute before the buzzer went off.

When it happened, it wasn't slow like the usual ones, or a quick burst of relief like when Amber had gone down on her. It was like an explosion, as if her body was simply giving up all control. She thought she was screaming something, far away, but she couldn't make it out; all she could do was hold on for dear life as electricity climbed her spine, and her pussy clenched the thick firmness of the dildo over and over and over. It wouldn't stop, even long after the momentary pleasure had died away and her cunt was simply aching with the strain of the spasms that shook her. She'd never known she could come like this. She really wished she still didn't.

She slowly came to herself to realize that the higher grade of punishment had switched sides again. Amber was crying out helplessly, bouncing on the piston so fast she was a blur in Jen's vision. Dark strands of her hair were clinging to her sweaty face, and the machine had momentarily slowed.

"02," said the orgasm count on the graph.

With a deep and complete resignation, Jen realized that the double digits were there for a reason. Their captor wasn't going to walk in the door in a moment and announce that they could have a break now, or take them back to the little room where they'd curled up and slept together. Neither of them was going to come up with a clever plan to dismantle the machine and turn it against him. Amber was going to come (even if "Subject 2 Arousal" hadn't been spiking into the red, Jen knew instinctively that the green-eyed girl couldn't hold out long), and then Jen was going to come, until they were long past resistance or exhaustion or mindless whimpers. The machine was going to fuck them until they broke, and each of them was going to watch it happen to the other.

Jen could feel the pulse throbbing in her aching pussy. It was almost all she could feel. She closed her eyes and waited for the spray of icy lube to wet her little slut pussy down.