Wait for Kate to go for a run

You could feel the cool breeze against your cups as she left out the front door for her jog. Without being totally clear on how your awareness of it worked, you could tell she was dressed in matching silver leggings and ankle socks. Maybe there was some...subtle communication between your own form and other clothing that you simply didn’t understand.

She opted against an overshirt, and you could feel her nipples perk beneath your cups as they responded to the crisp air. Even though you didn't have a focus on your body, it aroused you in a way you couldn't explain.

She stretched and shook herself out, and you could feel her boobs rock against your fabric net before she broke into a stride. You could feel every subtle bounce of her tits, and every strain against your fibers on her down step. Even with all your self-control, you couldn't stop yourself from squeezing her a little tighter, circling the fabric around her nipples and making her squeak a little bit.

That, of course, made her stop for a moment. She looked down at herself, visually inspecting her bra. You knew you were caught, in a sense, but what could she do? It wasn't as if she knew her bra had been enchanted by your magic spell, or that you were currently occupying it with your own senses.

In fact, she did exactly as you hoped she would do; the only reasonable thing for her to do. She lifted her own hands to her chest and squeezed the cups of her bra.

You could feel her warm fingers grip and hold you. She was literally pressing you against her tits, and once again, the strange feeling of arousal without a body coursed through you. You wanted desperately to respond to the touch--to answer back in some way, but it was still too early. She was only steps away from home, and if you irritated her too much, she could simply toss you in a laundry bin--and there’d be nothing for you to do but go back to your body.

The bra itself seemed to agree with your assessment. It didn’t feel the need to telepathically send you the message with any specific language this time; you simply knew it concurred. You maintained your self-control as Kate continued her jog, lost in the bob and sway of her chest as she pounded against the pavement once more.

The sun gleaming against you, the breeze she was generating through her pace and her skin itself were all welcome sensations--indescribable in human terms. You started to wonder if anyone had ever taken the leap to permanently place themselves inside an object--especially one as wonderfully intimate as this.

Though...you weren’t exactly sure how laundry time worked. And what was it like sitting in a drawer for days on end? Maybe you were getting ahead of yourself.

It’s not so bad as you imagine, the bra responded. I can’t imagine having to shower every single day...or go to work...or, yuck--eat, drink, and all that other nasty stuff you do.

That seemed like a fair enough response...and a reasonable perspective for a piece of clothing, to be honest. There were a few experiences of shared memory silently being passed on to you, and for the moment you had a little more empathy for the occupants of your own closet.

And then...some other sensation. Something new, with a powerful essence and an energy all its own. Something potent.

It was her sweat. Now her body was hard at work, tensing and releasing, pumping her blood faster and more efficiently. Beyond the shape and the motion of her incredible breasts, you could feel the metronomic thumping of her heart.

You were swimming in the sensations before long, and when you realized it had probably been 10 minutes or so since she started running, you decided that it was probably time to step things up. By now, she had to be more than a mile from her house. If you started messing with her, she couldn’t exactly take you off and toss you aside.

Once again, the article you were possessing seemed to agree with you--this time silently prodding you into action. The message seemed to be to start small, and lead up to the real fun.

She was approaching a park, and you decided to have a little fun as she was passing by a couple jogging the other direction. Your temporary sports-bra body seemed to consist of a few discrete layers, and you wanted to try something that would be visually obvious without being immediately clear to Kate’s own tactile senses.

You started outwardly puffing your own cups--stretching the fabric in front of Kate’s already impressive chest while trying to maintain the shape she held against the inner layer.

With every downstep, you puffed her chest out a little more, and when the couple was within a dozen meters, you started pumping up the volume more considerably.

Based on his expression, the guy jogging toward her obviously noticed the effect. You could feel his stare against your silver cups, and when the woman next to him noticed him noticing, she reacted defensively for a split-second before she realized the oddity herself.

Kate’s chest had seemingly ballooned out to ridiculous proportions, and by the time Kate herself seemed to notice, she was too close to these other joggers to try something like the manual self-assessment she’d done with you earlier.

Something was filling her sports bra, that much was clear--but beyond that, she had no idea what was going on. You did your best to keep the inside of the bra from feeling any different, and the thing was light enough that one of your layers jutting out in front of her didn’t really change the weight balance all that much. She decided to get well beyond the other joggers--much as both of them were staring at her chest--to see what the hell was going on.

Kate slowed her pace and came to a spot of shade under a huge maple when she looked around the park before facing the tree and looking down at her chest. Just when she did, you swelled the cups even further--this time dropping any attempt to keep the inner layer from shifting.

You actually made the bra grip her breasts tighter as you **** the other layer to balloon out in front of her, making her gasp.

“Wh--what the hell is with this thing!?” Now she dropped any concern of being seen groping herself, and her hands came straight up to the cartoony silver lumps inside the sports bra cups and gripped both of them--tight.

Something instinctual snapped in you, and just as she gripped the inflated outer layer, you passed the signal straight through the inflated space and to the inner layer, making Kate feel as if she’d just grabbed her own boobs. As the emulated fingers coaxed through the microfiber inner cups and groped her--Kate moaned a little, letting go suddenly and drawing her breath in deep.

As her chest swelled against you from the inhalation, you swelled back, inflating the sports-bra even bigger and making the cups bobble and sway on their own.

She shrieked. It looked to all the world as if her tits had gained momentum all their own and began jiggling madly in front of her, even though she wasn’t half the size they were displaying.

“St--stop! What on earth is going on here?” She looked around the park to see if anyone was watching her struggle, unsure if she was actively looking for help or reassurance that her solitude at least meant she was avoiding further embarrassment.