The truth was that both Brad and Kate had been turned on by the tying up games. After all, one of the main attractions of the whole transformation thing had been the shift in power between them. Kate liked the independence and feeling of being in control and Brad loved the thrill of being helplessly subservient to his beautiful girlfriend.
Brad and Kate had discussed a few options, but as usual it was Kate who had made the final decision. With a solution now clear in her mind, they had gone shopping for the perfect pair of shorts, a pair that was sexy, tight and most importantly, lockable.
One of the many advantages of having turned your boyfriend into lingerie was the ability to take him in the changing room. Unfortunately though, Brad's view when trying on shorts, dresses or skirts was limited.
Once locked inside the changing room, Kate squeezed into a pair of blue denim shorts. The cut perfectly fitted her narrow waist so that once buttoned up there was no way they could be removed over her hips. The rear seam curved tightly down between her legs and pulled Brad slightly between her cheeks. The denim tightly encircled the top of her tanned thighs conveniently cutting out all light and air to the occupant inside.
"I think these may be perfect," Kate whispered, "but let me just try the padlock."
She played with the small lock until she had positioned it over the popper that secured the shorts.
"Yeah, it fits and there's certainly no way to open the popper now."
Brad pulled and stretched as he explored his new home. It was tight, but then so was most of Kate's wardrobe. It was also very dark which Kate would say was a good thing as he could worship her butt without distraction from the outside world.
"Do I get a say on this?" he asked.
Kate ignored the silly question.
"Opps, I didn't actually bring the key for this lock."
"What? Guess you'll be buying them then."
Kate pulled at the tight denim material which seemed to have already moulded itself to the shape of her body, "It's kinda sexy being locked in these."
"Until you need to use the toilet."
Kate ignored him again and pulled her red top down to hide the padlock. She then ripped the label from the back of the shorts and took it out to the counter to pay.
*
When they returned home, Kate fetched the key and was finally able to unlock her shorts. With Brad hanging pitifully around her ankles and much to her relief, she sat down on the toilet. Brad spent his brief moment of freedom looking up as she re-tied her long brown ponytail and then pulled him straight back into place.
"Right the shorts are safely locked up again," Kate proudly announced, "and I thought we could celebrate with a little bike ride."
"These shorts on a saddle, you sure?" Brad asked warily.
"It'll be fun!"
"You sure?"
"Well don't come if you don't want to," Kate giggled.
Kate had already wheeled her bike out on to the road and was straddling the cross bar. She eased back down on to the saddle, letting her butt mould in to place around the black leather seat.
"OK?" she checked.
"Yeah it's actually nice, the saddle massages me in just the right place."
"Good panties," Kate smiled, "I knew you'd like it down there."
Kate started to peddle, her legs tensing, her glutes pushing in turn against the soft saddle.
"Still nice I hope?"
Brad touched her clit in reply as he lay beneath her, moving and stretching as her butt massaged him.
"Hey, touch me there and we'll both end up in a ditch!" Kate cried before realising that she may have been overheard by a passing cyclist.
It was now early afternoon and Kate was still riding and Brad was still stretching and straining to contain her body. A cyclist rang her bell as she passed by.
"Hey she's pretty," Kate relayed to Brad, "you'd like her."
"Where?"
Brad had replied without thinking, still totally aroused from the movement of Kate's butt on the saddle. He looked to see if anything was visible through the seams of the warm denim that was starting to winkle around her hips. He couldn't.
Kate was giggling.
Her skin was now tacky with perspiration which Brad was doing a great job at soaking up. She could feel that he was now wet, particularly where he passed between her legs. She could have stood up on the pedals to give him some relief, but she didn't.
"It's getting hot in here, any chance of a rest and maybe some air?" Brad panted, exhausted from the unrelenting sexual stimulation.
"No rest and air is impossible as I didn't bring the key."
"What?"
"And you tried to look at that girl...bad move," Kate laughed as she cycled harder.
Now desperate for her to stop arousing him, Brad rubbed back and forth across her clit.
"Bad panties!" Kate cried out in fits of laughter.
"Bad butt! Do you know what it's doing to me in here?" Brad moaned back, as he came again.
"Okay, Okay!"
