"Running without underwear, how sexy is that!"
Amy grinned through wide shiny lips as Ben pulled off the road and drove slowly along the unmade track into the forest. Amy twisted her hips and climbed across the central console to straddle Ben's lap. She loved the illicit feel of making out in the car and she trembled vocally as Ben's hands explored her white crop top and short pink running shorts.
"So freeing," she mouthed.
With so much of Amy's flesh on show, Ben's Prince Albert chastity cage was clamping down hard even before Amy took his hand and slid it inside her shorts.
"Naked," she whispered.
He touched her clit and watched her large brown eyes dilate until the cage that she kept him in bit down to punish him.
"I brought the key," Amy whispered seductively, freeing his hand from the front of her shorts and rubbing it against the soft fabric that curved around her bottom, "I've attached it to the inside lining of my shorts," she whispered, "So maybe if you can keep up?"
"I'll keep up," Ben growled, pushing his tongue deep into her mouth.
His fingers felt the key through the shiny pink fabric, pushing it deeper between her naked cheeks. There was an immediate reaction from Amy, a trembling breath and an endearing moan as the key sent tingling anal sensations through her pumped body.
"You're so close," Ben mouthed.
"Well, I have to orgasm for two," Amy whispered, "Cos you're in prison."
"Only 'til I free the key from in here."
Amy quivered as Ben worked the tip of the key against her.
"Oh fuck," she moaned, her tongue playing with his, "I've changed my mind, I'm keeping it."
Amy leaned forward, resting her chest against his as she stroked and massaged her own buttocks, her fingers moving closer and closer to her hole.
"Kept locked by an anal slut..." Ben breathed, as four hands now worked against her cheeks.
"Life's a bitch," Amy moaned as she clamped her thighs around him to hold her steady as she stretched to pull a tube of lube from the glovebox, "Some girls have to orgasm to get to the mood for anal... I just need your key."
Amy pouted as Ben prised the tube from her fingers, but then let out a delighted trembling breath as he squeezed it on to his fingers and ran his hand down between her goose bump covered cheeks.
"Fucking amazing," Amy mouthed, "Can't stop trembling."
Ben circled her hole, every movement reflecting in her wide, wonder filled eyes, "See, you don't need the key here anymore," he breathed.
"Dream on," she mouthed, "The only reason you're indulging this fucked up anal slut is 'cos she has your key in her fucking ass!"
*
Amy was still trembling as they climbed out of the car and gazed up at the trees and the mountains behind. It felt sensual to be in the wilderness, tens of miles from the nearest person. Amy was bouncing on her white running shoes, her sexual energy making it impossible for her to stay still. Everything on her tanned body was flexing, with the muscles on her strong legs shaping and tensing as they took her weight.
Amy pulled her hair into a ponytail as she watched Ben stretch, the bulge of his chastity cage already swinging inside his black shorts. He then turned to run.
"Whoa," Ben cried, his quads tensing as he screeched to an immediate halt.
"Problem, sweetie?" Amy asked sweetly.
Ben held his cock cage through the shell of his running shorts. Amy had insisted that they not wear underwear and she had also cut the support lining from his shorts. As a result, there was now nothing to support his heavy, high security chastity cage from swinging and tugging with every step.
"Amy, this won't work."
Amy wiggled her hips, "But if you don't keep up, you don't get the prize," she sung alluringly.
"We could make out here," Ben suggested, smiling at her provocative reaction. He knew that asking Amy for the key always led to long periods of incarceration, plus he was now faced with a belligerent woman with her hands firmly planted on her hips.
"Or I can leave you chained up to a tree!" she exclaimed, her face slowly breaking back into a smile, "...while I skinny dip."
Ben held his hands up in submission, "No, I'm coming."
"I doubt it," Amy giggled.
"Anal slut," Ben replied.
"Yes."
"One day?" Ben asked hopefully.
Amy didn't look convinced. "If it any consolation, the key is swinging just as much between my cheeks." Her brunette ponytail was now flicking from side to side in time with her hips.
"Arh, Amy! That image doesn't help!"
They set off again, Amy leading the way with Ben running carefully behind her. The swinging cage was tugging and twisting his balls which at first felt nice, stimulating his genitals and bringing him closer to the edge. But with the sensation growing more intense and his cock unable to expand, he soon stopped, dropped to his knees and clutched his cage.
Amy strutted back to him, her face flushed and her hands on her hips. She could feel goose bumps on her legs as Ben kissed her inner thighs, gently working closer and closer to the hem of her short running shorts.
She trembled, her legs sliding wider to invite Ben's lips to venture deeper, "At least the key will be well lubricated after a day inside my sweaty shorts... and there's also quite a lot of lube still in there," she smiled shyly.
"Butt, lube," Ben mouthed, tapping his cage in an attempt to dissipate the pressure.
"Oh sweetie, is it imposing its strict discipline again," Amy giggled.
"Yes," Ben sighed.
Amy kissed him and ran off again, leaving Ben following in her wake. The key tingled as it vibrated between her cheeks. She stopped and push it deeper, her body lighting up as she worked it against her. She then started to run, enjoying the feeling as the key broke free from her lubed-up cheeks and dangled once more from the mesh lining of her shorts.