Testing Day
It’s a cool autumn day when Halfeb pulled up to the lab. Cassandra had invited him and Yuna to the lab to help with testing with some experiments. They both had always had a love of science and were happy to help and the offer of a thousand dollars for a day of testing wasn’t bad either. Halfeb stepped out of the car. His muscular dingo body fitted well in his tight t-shirt and black pants. Yuna stepped out her side of the car, in her jeans and pink tank top.
“What time is she expecting us again?” Yuna asks as they walk into the lab.
“About ten minutes ago. Fucking traffic…” Halfeb mutters as he looks at his watch. Cassandra is already in the lobby of the building. She runs over and gives them both a huge hug. She had always been very friendly. When Yuna first met Halfeb she was jealous of Cassandra and her full round bovine figure.
“So glad you guys could make it.” Cassandra said as she gave them forms to sign. “Just some standard release forms. Don’t worry, there should be minimal side effects from the tests. The lab just needs these just in case.” She adds as they both sign. They knew Cassandra was a great scientist and friend and wouldn’t put them in danger. She takes the forms and hands them to an assistant to file. “Awesome. Follow me.” She says as she leads them down a corridor and through the lab before taking them to a small room with a viewing window. Inside the room were some simple homely things. A bed to lay on, a coffee table and a couch. All of it look very sanitised and clinical but comfortable.
“Wow… nice and homey I guess.” Yuna says as she looks around. Halfeb lets out a quick chuckle of agreement.
“Well, it’s not to live in. It’s just a place for us to stay while they do the tests.” Halfeb responds as he sits down on the couch. Yuna sits next to him and gives him a kiss as they wait. Cassandra soon comes in with a small bottle and a glass of water.
“Okay, so, theres a pill in here. Halfeb I want you to take it.” She says as she hands him the pill.
“Umm, okay, what’s it for?” He asks as he takes the water and pill from her.
“It’s actually full of nanobots that will allow you to repair flesh and skin and whatnot within seconds.” She says. Halfeb thinks about it for a second and takes the pill. Cassandra watches him and then smiles. “Awesome. I’ll be back in an hour to see how you are doing.” Cassandra then walks out and shuts the door. Yuna turns to Halfeb and smiles.
“How you feeling, babe?” She asks as Halfeb leans back.
“Fine. I have no idea how long this thing will take to kick in, so, just keep an eye on me incase, you know, I start going weird.” He says as he relaxes. He starts to feel tingling and tickling going through his body. He starts chuckling to himself.
“What’s the matter?” Yuna asks concerned.
“I’m fine,” He says lightly giggling, “Just tickles is all.” As he giggles he looks over at Yuna and looks her up and down. He always found her so attractive and sexy. He bites his bottom lip. She blushes, she knows that look.
“I’m guessing one side effect is being horny?” Yuna says as she watches him look her over.
“Huh?” Halfeb says as he’s in a daze just looking over her fine canine form. Her sexy round kelpie ass and large breasts that he loved so much drove him crazy with desire. Yuna looked over his body too and she could swear he was getting more muscular. His arms, which were already quite strong, were becoming more defined and larger.
“H-honey… look.” She says as she points at his body. He looked down at his now ripped body.
“Whoa.” He says as he stands up before her. He flexes as a joke but in doing so his shirt rips. “Uh oh… uh… let’s take this off before I do more damage to it.” He says before slipping it off. He stopped becoming more muscular finally and looks quite buff and sexy with his shirt off. Yuna can’t stop groping him with her eyes. He can see her do so and smiles and takes her hand, “Come here sweetheart.” He says and pulls her to him and holds her in his strong arms. He towers over her with his impressive strength. He grabs her ass with his strong hands. Yuna smiles to herself, feeling amazing in his strong arms. Then she starts to feel tickling where he grabbed her. Her jeans became tighter and start to rip too. Yuna looks back and her ass is definitely bigger. The two stare at her round huge ass.
“What the hell? I didn’t take the pill. How did that happen!?” Yuna askes to no one in particular and feels her now larger ass. Halfeb looks at his hands.
“I… don’t know. I was just feeling your ass and thinking about how much I love it and I guess the nanobots must… have changed you?” He says in an asking way due to being unsure. They both think for a moment before Yuna speaks.
“Use it on my chest.” She commands.
“What?”
“I want breasts like Cassandras. I know you do too. Make mine like hers.” She says commanding him again.
“Sweetheart you know I love your boobs the way they are.” Halfeb responds.
“Don’t argue with me just do it.” She commands again. Halfeb looks worried that she would think he didn’t think she was perfect but decides to submit to her request.
“Take your shirt off.” He says as she slips off her tank top. Her breasts already bounce out and get ready for his strong touch. He reaches over and takes her round and tender breasts into his hands. He starts to caress them. She closes her eyes. His strong, large hands feel so nice on her breasts that she lets out a moan of pleasure. It’s never felt like this before. She always loved having her chest played with, but, this time it was actually turning her on. And not just making her hornier turning her on but actually having sex turn her on. She blushes and moans louder. She cannot help herself. It feels so good.
“Uh sweetheart?” Halfeb says, interrupting her. Yuna opens her eyes and looks down. Her breasts are missive. They’ve gone from DD’s to at least a G cups.
“Oh wow…” She gasps as she feels them. They’re large and heavy, but feel so good. “Keep going…” She says to Halfeb.
“Uh sweetheart?” Halfeb responds.
“What? I want them even bigger.” She responds still playing with her new boobs.
“Not the issue I wanted to bring to your attention.” Halfeb responds.
“What?” She says looking up and notices right away what he’s referring to. His pants are damn near burst with his now massive member. The nanobots have made it much, much bigger. It was usually about seven to eight inches long. Now, the bulge that threatens to destroy the pants was at least a foot long and four inches thick, and not even at full erection. “Whoa… I like these nanobots…” She says then looks down at her new massive tits and looks back at Halfeb smiling. “Get it out.” She commands. Halfeb undoes his pants and his massive cock seems to spring itself out of his pants. It’s thick, long, veiny and right in front of her. “Now sit.” She commands. Halfeb seems to be at her beck and command. He sits down on the couch, his massive cock standing before her, straight up and rigid. She couldn’t help but smile as she walks over to him with her massive tits and wrapped them about his cock. He moans in pleasure.
“They’re so warm…” He moans as she slowly starts to massage her breasts up and down his massive hard on. Although her tits are now huge, they still aren’t big enough to completely envelope his massive cock.
“Shush.” She commands, “Now just close your eyes and think about how good this feels.” She teels him as she works her tits on that cock. She loved making him feel this good. She watches him close his eyes and lean his head back. Suddenly she can feel her boobs get even bigger as they tingle from the feeling of the cock. She smiles, still getting bigger. She leans over and wraps her lips around the head of the cock.
“Oh god… this whole thing is making me wanna cum.” He says as he moans.
“Oh no you don’t. Not yet.” She insists. She then feels something strange happen with his cock. She looks down and see’s that his body has made a flesh band around his cock one that will keep him from cumming. She backs off and bends down and looks at the new band. She pokes it a little in confusion. It feels solid and warm. “Oh wow… I love these nanobots.” She says before standing back up. She smiles, slips off the last of her clothes and gets up on the couch and straddles herself over the cock and starts to rub the head against her dripping wet pussy. She looks down at him. “Listen here my dingo slave boy. I’m gonna fuck you till I am done and ONLY when I command it, may you cum.” She says feeling very dominant. Halfeb opens his eyes and nods to her letting her have the complete control she desires. She smiles, “Good boy.” She lets his head before slowly sliding down his massive cock. It was thick and hot inside her. She closes her eyes due to the pure pleasure. She felt every inch of it as it slowly slides in. It was so much bigger than anything she had before. It felt like waves of melting pleasure flowing through her body. She opens her eyes and looks down feeling so full of that amazing cock. She notices she’s not even half way down it. She pants, “Y-you gotta be kidding me! I don’t think I can fit anymore and I’m not even half way!?” She yells. Halfeb looks up as her and closes his eyes and grabs her hips tight. “W-what are you doing!?” She asks as he starts fucking her wet and wanting pussy. She screams in pleasure. It feels so good but she wants to feel that band inside her. Suddenly her hips and pussy start to ingle and tickle as she feels herself take more and more cock. She has no idea how she is doing it but her pussy is bulging and stretching to take all of this behemoth. Her hips tingle and tickle too as they spread wider and finally her pussy stretches up inside her and allows her to take so much more cock. She finally feels the band suck her pussy. It’s like nothing she has felt before but its pure pleasure against her pussy and clit and in pistons in and out of her faster and faster. She can’t take it anymore and without warning she cums all over that monster of a cock. Hot waves of intense pure pleasure roll back and forth over her shivering body. She can’t stand anymore as she collapses onto him. He easily catches her and makes sure she lands gently. He pants and holds her.
“Can I cum?” He whispers to her. She shakes her head and slowly gets up and kneels before him holding her massive, now LL cups sized breasts together and opens her mouth.
“I’m ready now my love. I want you to cum as much as you can over the gifts you gave me.” She says as she kneels before him. She can visibly see the band disappear a moment before a torrent of hot tasty potent cum jets out of his cock all over her tits and face. It shoots into her mouth too but there is far too much for her to take into her mouth alone. There is far more than she even thought possible for him to have inside of himself. She loved every drop of it too. He came for what felt like a solid minute before finally being out of the wonderful hot liquid. She finally opens her eyes. Shes covered in her cum. She cannot believe it and neither can he.
“Holy shit…” He finally says as he pants and looks at her. He leans over and kisses her cum covered lips. Suddenly, and without warning they both returned to normal.
“Hey! What the hell!?” Yuna yells.
“Please get dressed and come out when you are ready.” Cassandras voice says over the intercom into the room. Yuna blushes. She’d forgotten that they were being watched this entire time. Yuna quickly gets dressed. Her pants are still a little ripped but, nothing is showing so she just wears them Halfeb has already gotten dressed. His shirt is still kind of ripped but it’s okay enough. They walk out to where Cassandra is waiting. She hands them both their money.
“Thank you so much for the help guys. If you come back next week, I’ll have another experiment for you.” She says with a smile.
“Hey why couldn’t we keep how our bodies were?” Yuna asked as Halfeb counted his money.
“We don’t know thy long term effects of the changes. So it’s a failsafe of the nanobots.” Cassandra responds.
“Oh… okay… so next week?” Yuna responds.
“Same time.” Cassandra bids them good bye and goes back to her observation room where she looks down at the wet dildo she had been using and smiles. “Damn I love science…”

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Halfeb, Cassandra & Story ©  Halfeb_the_Dingo
Yuna ©  ~yuna~