They find the remote after school, at Karie's
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The two kids are walking down the sidewalk to Karie's house, chatting away about the anime they had been watching, Alan's eyes darting down to Karie's breasts as they walk through the door. She probably won't let him fool around, but maybe. Just maybe.

The idea is jarred out of his head when he hears Elena call out, “Hey, Karie. I'm a little busy, but you had a package show up! I put it in your room.” The older, and still pretty attractive, woman calls out from her office. She has her own business picking up used goods and turning them around online and she's pretty good at it.

“Thanks, Mom!” Karie calls out, smiling at Alan. “Alright, she'll probably be busy for a bit. Let's go see what I got.” She says, trying to remember what she might have ordered that had slipped her mind. Alan nods, calling out “Hey, Ms. F!” “Make yourself at home” echoing back in reply.

Karie sets her backpack down on her desk, Alan dropping his by the door as he walks to her bed, “What's this, Karie? Why did you get a remote?” he asks, a little confused as he picks up the box with it's odd little blurb.

“A remote? I didn't order a remote.” Karie says, moving over to look, swiping the box from Alan's grasp. “That's strange, but it's addressed to me.” Alan shrugs at that, “Well, open it up at least. It's a little heavy for just a remote.” With an “Alright” Karie opens the box, pulling out the device along with it's surprisingly thick manual. “I don't know, it just looks like a remote.”

She does something to Alan
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Of course, there's the question of Alan's awareness of any changes made to him.

She copies something onto Alan
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So let's add a few more options to what Karie copies onto Alan.

Karie copies her breasts onto Alan
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The two almost jump at the last click, a pair of C-cup breasts pushing out from Alan's chest, his shirt changing and a bra popping into existence. Karie shouts, “Oh my god!”, Alan “Oh hell!” as his hand go to his new breasts, although the moment of shock is replaced by a slightly giddy smile as he cups his bust.

“It works” Karie says in disbelief, her voice trailing off. “Hell, this is kind of awesome. And people will think I've always been like this?” pulling his phone out of his pocket as he asks, wanting to look at a photo of himself. Alan breaks out into a giddy laugh, turning his phone around to show Karie the picture of them standing together, him sporting the same breasts. “Check it out.”

Alan grows her breasts
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Alan holds down the plus button on the remote, his eyes sparkling as he gets the soda, Elena's D-cup breasts swelling larger and larger, the boy having to work to keep his jaw from dropping. Especially by the time he lets go of the button. He couldn't begin to guess what size breasts Elena has. They're bigger than some beachballs he's seen, easy to see from the back and just a little shy, at least with a bra, of resting in her lap if she sits down. Her blouse grew along with them and is still pretty modest.

Alan turning to hide his growing erection, decides to hedge his bets by copying how he feels about those massive globes onto both Elena and Karie. With that, Elena's top changes from a more sensible blouse to a rather skimpy tank top, showing off and incredible amount of her luscious breasts.

Alan finally notices that his, and Karie's, breasts have gained a couple of cup sizes, the change seeming to have made Karie's entire family bustier, including Alan's copy of her breasts. He saves Elena into the remotes memory as he pulls his friend out of the kitchen and back towards the stairs, speaking softly to her. “So, can you guess what I did?”

Karie shakes her head, “No. My mother looks as sexy as ever, Alan.” Alan just grins, shaking his head, “Oh no, I grew her breasts. You didn't notice.” Karie's eyes go wide at this, “What, really?” She nearly shouts as the go up the stairs. “You didn't. I remember her having those. You know I want to be as big as her.”

Alan laughs, brandishing the remote, “Well, that's possible. But if you want to keep playing, we'll need to come up with something or I'll have to leave for dinner.”

Karie pauses for a moment, sitting down on her bed. “Yeah... we should do something about that. I have an idea. Hand that thing over.” It takes Alan a moment before handing the thing off to Karie, a little worried, but excited as well.

Karie thinks for a moment longer before using the remote.

The change is definitely physical
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Karie uses the remote to cause some physical change to Alan using her mother.

Alan is sharing Elena's body
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Karie solves the problem of Alan having to go home by merging Alan with Elena, sharing her body somehow.

Their minds are still separate
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Alan gasps, disoriented by the sudden shift in his body, Elena's gargantuan breasts weighing him down, his hands going to them, a moan escaping his lips. They shouldn't feel this good to touch, but the growth button had increased the sensitivity of Elena's breasts. Alan just about jumps when the words, “Alan! Don't grope me right now!” escape his lips with a giggle. “E-Elena?!” He cries in shock.

“Hey, try... putting her to sleep. Just think about it.” Kaire says, Alan closing her eyes. After a moment, he opens them again. “Elena?” He asks again, before smiling. “Wow. She's asleep. I can feel it.” With that, he runs his hands down the body he's inhabiting with a smile as he looks over it, especially those breasts, twisting to look behind him.

Karie giggles at this, “Yeah. I guess that worked the way I wanted. You're sharing my mothers body, but you can control everything about her. Including her mind, so you can keep her from noticing the remote and make her accept anything we want.” Karie licks her lips, stepping closer to Elena's body, her hands pressing into her mothers massive breasts with a moan, Alan moaning as well. “Plus I've always wanted to get my hands on these. God, looking at her always turns me on.”

Alan practically shorts out, Karie more turned on grouping his... her mother's tits than she had been in any of their awkward forays of tentative exploration, his new pussy starting to get wet in arousal. “O-ohhh, hell. This is amazing, Karie.” He moans out. With that, his friend blushes crimson red and steps back as she stutters, embarrassed, “S-sorry. I... it's just she has the most amazing breasts.”

Elena and Alan shower before bed
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Having had fun hanging out, it rolls around towards bedtime, Elena and Karie parting ways with a hug, the older woman going into her bedroom, Alan starting to flush their body in excitement at what might happen. Elena smiles at the feeling, walking through the door to her bedroom, “Ohhh, hold on you little minx. Try not to get too excited before we get into the shower.” She says, pulling that tank-top up over her breasts and her head, leaving them clad in her half-cup bra.

“Oh, hell. You're just... so sexy,” Alan moans out, mentally stopping in shock as Elena reaches her dresser drawer, pulling out a vibrator. Elena giggles at this, licking her lips. “We, Alan. I can't believe you don't think of it as your body as much as mine by now.” She slides the vibrator, still off, across some of her sensitive breasts, making them both moan and stifling Alan's response.

Alan is speechless as Elena walks into her bathroom, shedding clothes, loosing her behemoth breasts, Alan realizing that without her bra, they will rest in her lap, his arousal causing Elena's pussy to get wet and making her giggle again as she leans over to turn on the shower.

Alan just moans, shivering in pleasure after Elena steps into the shower, lathering her hands and running them down her body, across her breasts, teasing her hard nipples, their body tingling with Alan's lust, Elena's own mixed in with it until their panting with need, barely holding on by the time his body-mate rinses off, finally reaching for the vibrator she brought in. She leans back against the wall, spreading her legs, teasing them both, running it across her pussy lips, against her clit.

Then she finally slides it in, the two moaning before cries of pleasure escape their lips when it finally turns on. Their body is so primed, the buzzing pleasure running through their sex brings them to a climax in hardly any time at all, Elena's legs shaking as her juices gush from her slit, the pleasure pulsing again and again, Alan losing track of time in it. He's dazed by the intense orgasms, Elena dried off and just about to slip into bed before he recovers. “Ohhh, back again? You feel so good fuzzed out in pleasure. I makes it... linger,” She says, slipping into bed and pulling the covers over her nude, busty body, her breasts resting against her as she drifts to sleep.

Alan turns things seriously kinky
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Elena's body is practically tingling with Alan's aroused excitement. When he's done with this, he'll be living out so many sexual fantasies. Admittedly, they've changed a bit since this morning. It's going to take more than a few things to get exactly what he wants, but being able to use pictures means it won't take that long.

Alan steps into Karie's room again, having used the remote just a little on Elena and himself. He locked in how erotic he finds being a passenger in Elena's body, made her pussy and clit even more sensitive, and upped their libido and arousal to a low, constant level. Finally, he had tweaked out the few effects of aging that Elena had suffered, edging her body back into the stunning knockout territory she must have been in ten or so years ago.

The first thing Alan does is swap the ownership of the dildo he's holding with Karie, making it her sex toy. Simple enough. Then a click and Karie is no longer fully female. Now with a 10-inch cock and a sack with grape sized balls. Hairless. Alan licks Elena's plush lips, feeling their pussy start to get damp as he sees the dildo has transformed into an onahole. “Perfect” he whispers under his breath.

About halfway done. That isn't nearly enough. With a generous use of the growth button, Karie's cock is a huge 24-inches, a click making it the same size flaccid as it is hard, the idea of her having to keep dealing with that shaft getting in her way exciting Alan. He then gives her absurd balls to go with it. Basketball sized. A few more clicks and she's always mildly aroused, although not always hard, with a libido that'll need release every three to five hours.

Looking at the onahole Alan see that, sure enough, it's grown to accommodate Karie's new mammoth cock. “Good,” he thinks, using the remote to merge it with Elena's body. The result growing her pussy to be able to take Karie's cock and causing Karie to think fucking her mother is as acceptable as using a sex toy. Alan is unaware of a change to reality this causes. Elena now accompanies Karie everywhere. An assistant to help her daughter with her arousal “disability.”

Alan shivers, almost done. Using the remotes memory, he copies an attribute from some pictures of zoo animals he found online. Ones that were mating in their enclosures, making it socially acceptable for Karie to take Alan and Elena pretty much anywhere they happen to be.

With one finale click, Karie disappears from her room, now laying in her mothers bed.