Wiping the sweat from her brow, Ryn stepped back from the machine she'd designed, after pushing it up the ramp from her basement into her back yard. "That should do it. It should be perfect now," she muttered to herself. "And just in time. My urge... my need... has gotten so intense that I'm having a difficult time sleeping." She couldn't explain why this need for self-bondage was so overpowering. It just was.
She scanned her checklist to make certain every enhancement was incorporated. "I've moved the timer display to where I can see it... check. That should stop any surprises about improper settings. I've also added manual steering controls so Louise, Harry or Joe can more easily direct the cart in emergencies." She looked behind the seat -- a saddle-shaped sybian with its vertical dildo. "Battery backup with a power switch I can toggle with my toes... check. No more running out of power in some weird place. I'll have enough to retrace my full path, if necessary. I had to use smaller batteries, with less charge, but this is more versatile. I think it's a good compromise."
She walked around the periphery of the cart. "I didn't need to alter the sensors it uses to prevent collisions. However, this new refinement should also help," she said aloud, since vocalizing information often helped her focus. She examined the underside of the horizontal brace bar where her hands, held behind her, would rest. "The activation button is still on this side, but on the other side is the toggle I've installed. When on, it should interact with the posture collar around my neck. I've tested that system thoroughly. When the toggle's activated, slightly swiveling the posture collar left or right will steer the cart in that direction. The turn will be slow, but at the slow trundling motion of this cart, it should be adequate to give me a modicum of manual control, even when fully secured."
Her face betrayed a tiny expression of displeasure as she regarded the large red button she'd installed on the side of the timer display. She sighed. "I hated to even add an override for the timer. One press on that button and the timer zeroes out and all my restraints are released. Given what happened before, it seemed prudent to add it. But it goes against the overall thrill of being completely helpless for a set time in self bondage. At least it's placed where I can't reach it when bound."
She looked at the final item on her checklist, and a grin appeared on her face. She checked another part of the posture collar. "I sure hope I never have to use this feature," she chuckled. She thought, "If I ever have to get anyone's attention, like needing help, all I have to do with this improvement is dip my chin down as far as it will go, and that'll activate a brief honk on the horn I've installed."
But thinking about that last refinement gave her an exciting, kinky idea. "I just have to try out this new version of the cart." As she was thinking this, she was already kicking off her shoes, whipping off her T-shirt and stepping out of her shorts. Since she wore no bra or panties, she was naked in virtually no time at all, and her pussy was already dampening. Her figure was strikingly beautiful. From the ground up, any lucky onlooker would see delicate feet, long shapely legs, a fully shaven and very erotic pussy, generous hips, a narrow waist, and a 38C chest. If he or she could tear their eyes away from Ryn's breasts, they'd see her lovely neck leading to a beautiful face with high cheekbones, twinkling blue eyes, and topped by a head of long, silky blonde hair.
Meanwhile, she was formulating her plan of action. "For my maiden voyage in this new version, I think I'll ride it over to Louise's house next door and honk to get her attention! She'll be surprised to see me cruising in her back yard, and will be begging me to try it herself, I bet. It's true that I'll have to go down my driveway and use the sidewalk to get over to her driveway. For that brief period of time, I'll be more publicly visible, until I disappear behind her house." She shivered with excitement. That idea of a brief risk just whetted her appetite for the upcoming experience.
Climbing aboard, she had no trouble whatsoever sliding her damp pussy down onto the saddle's dildo. Leaning forward, she set the timer to '00:30' -- 30 minutes. "It'll only take a minute or so to reach Louise's back yard, but I'll want to put on a show, maneuvering. And if she gets impatient, she knows how to remove the gag, and I can explain the release button," she muttered to herself, her breathing accelerating as she slid her pussy up and down on the dildo, wetting it more thoroughly.
Settling back again, she positioned her legs so the straps when tightened would anchor at her ankles and also just below her knees. She drew the straps across her torso, across the tops of her breasts and also just above her navel. Carefully, she closed the posture collar around her neck, until she felt and heard it click into its locked position. Finally, she blindly threaded her arms down through the straps that would confine her elbows and wrists. There was already a tiny trickle of her pussy juices in the groves in the saddle that ran from its dildo to its collecting cup, and she could smell their fragrance. She took a deep breath, and then used a fingertip to press the activation button on the underside of her hand brace bar.
As designed, motors and pulleys came to life, and the various straps tightened around her flesh, holding her firmly in place on lewd display. An automatic gag slid up from its resting point near the top of the posture collar, and snugged its ball gag into her open, waiting mouth. Once the strap motions reported that their task was accomplished, the drive mechanism engaged, and the cart began moving. Toggling the switch to turn on posture collar steering, Ryn was off on her latest adventure! It'd be difficult to describe how being bound like this thrilled her to her core!
She was turning the posture collar slightly left, angling the cart toward her driveway when the dildo sprang into action. It was programmed to activate at random times, at random intensities, for random amounts of time. By chance, it came on at full intensity, and the shock made her scream! Thankfully, the ball gag muffled her sound, but she had a difficult time concentrating on steering with those waves of pleasure resonating from her pussy demanding her intention.
As stated, Ryn was already quite aroused by her self bondage. Consequently, she had her first orgasm just as the cart reached her driveway. Eyes watering a little, pussy watering a lot, she managed to correct the cart's course down the driveway. Her breath was puffing in and out of her flared nostrils as the dildo finally ceased vibrating. Her breasts barely showed any areolae, since their tips had constricted into wrinkles that thrust her burgeoning nipples as far forward as possible. With the posture collar around her neck, when Ryn directed her eyes to look downward, she usually couldn't see her nipples. But at this moment, the prominent areolar constriction plus their own added engorgement thrust their tips into her view! That sight, plus the thought of other people seeing them like that almost made her cum again.
Momentarily closing her eyes as a post-orgasmic tremor ran through her, she opened them again to find it was time to begin directing the turn toward the sidewalk. As she turned her head slightly to the right, the cart obeyed, and was soon perfectly aligned with the sidewalk. Her feeling of triumph was turned to one of arousal as the dildo filling her honey pot began buzzing again, this time at a moderate level. She enjoyed the vibrations... a little too much.
When the vibrations stopped, Ryn noticed that she was already at Louise's driveway. Reflexively, she turned her head fast to the right to turn the cart. There was no way for her to see the slight wisp of smoke form under the cart, drifting off behind it. The harsh attempt to turn had overloaded a faulty solenoid. The cart now refused to obey any posture collar command to turn right, be it gentle or stronger. Ryn couldn't make the turn into Louise's driveway! Gagged, she couldn't call for help! The horn wasn't strong enough to be noticed this far from her friend's house. Ryn's rapidly beating heart was soon trying to leap out of her chest as an understandable panic arose.
The cart continued a slow trundling along the sidewalk, going uphill, away from the town center, at least. This area had long blocks, so Ryn had a long wait, watching the cart approach an intersection. When she finally reached it, thankful to see that there were no cars, she let the cart enter the street, and gently urged it to turn left, in the hopes of heading back.
As she crossed the street, she again gently urged a left turn, aiming for the sidewalk across the street. If she took that, she'd be on the far side of the street from Louise's house. Only then did she realize that even if she maneuvered back onto the correct sidewalk at the next intersection, she'd still not be able to turn into either her own driveway or Louise's because they'd be right turns! Consequently, she let the cart execute a full 180 degree turn, herding it back toward the correct sidewalk. She was thinking and planning now. "When I get there, I'll have to turn 270 degrees to the left to get back onto our sidewalk. Then I can guide the cart into Louise's driveway with a final left turn," she assured herself. Looking at the timer display, she saw she had about 25 minutes left. Even at the cart's slow speed, she'd cover a lot of distance in that time. If the battery drained, she knew she still had the backup battery.
But when she was nearing the sidewalk, she impulsively tried a right turn once more, to no effect. Slightly panicked, she turned hard left, pressing hard on the posture collar. This overheated yet another circuit, resulting in another tiny wisp of smoke, and now the posture collar no longer had any turn control! The cart's collision sensors ran independently, so they still worked, noting the tiny bit of low curb on its right, and skillfully guiding the cart safely onto the sidewalk -- going the wrong way! Ryn was so shocked by her complete loss of control of the cart that she failed to notice that the strange, brief power surge had also changed the timer display to 01:24 -- almost an hour and a half now!
Her eyes were flicking right and left, trying to think what to do. She was grateful that she was certain the collision sensors still worked, but without her ability to steer, that wouldn't help at all, unless some chance obstacle miraculously aimed her the right direction. Inexorably, her cart continued on its journey up the long, long blocks, carrying its naked, helpless woman on salacious display. Her nostrils flared as a momentary panic threatened to make her hyperventilate.
Soon Ryn was moaning, and not just because the dildo inside her sprang into life again, at about 80% of its maximum intensity. "I... wish... Harry or Joe... or *groan* Louise were here... *gasp* they could take over the steering... ooohhh fuck!" she thought, as her body was wracked by a strong orgasm. Her body was warring with her mind, and winning -- being bound and helpless like this was amazingly arousing. More cum juices streamed down the saddle grooves into the receptacle. Even though she'd cum, the dildo continued buzzing forcefully, and she spiraled up into another climax that made her eyes cross from its breathtaking intensity.
As the orgasm waned and her eyes came back into focus, her fear of discovery began to panic her while paradoxically it also turned her on! She heard people in their houses, talking. She dared not turn her head, worried she might make some other malfunction rear its ugly head. So she could only strain her eyeballs in their sockets, looking primarily hard to her right, since those were the nearer houses. She expected at any moment she might see the twitch of a curtain, followed by a scream... something like, "Harold! There's a naked woman on lewd display in front of our house! Call the police! Now! Call them now!"
At other times she heard dogs barking furiously, probably aware that some invader had the audacity to intrude on their personal sidewalk. She was thankful they weren't outside, running free (which would have violated a city ordinance) and able to pursue her cart. But still, more than once she heard the dogs' owners yelling, "Shut up! Stop all that barking!" Apparently, the dogs did that often enough that the owners weren't curious enough to see why they were barking.