It was mistaken for a water bottle

The container plopped itself right beside a water bottle on the counter, coming to a complete stop just as John and Suzy entered the room.

"Come on, Suzy, can't I help you with the soldering?!" John pleaded, walking behind, waving his hands around "I don't think you understand how much this means to me!"

Suzy smugly grinned to herself. Hook, line, and sinker. "Well, you could help I suppose. And I suppose I could use some help. But wouldn't you suppose that I'm supposed to get a little more for giving you the house for the night?"

John paused in place, silently opening his mouth in realization. "Ah... I see. So what are we talking here? Don't do that whole 'what do you think I'm talking about' BS, I know you know what you want."

"Wow, you're no fun. It's a figurine."

"Oh, some doll-"

"Not just some doll, it's

"How much?"

Suzy pulled up the listing and showed her brother, whose mouth dropped on reading the price. "You've got a part-time job, don't you?" she questioned.

"Yes, but I-! That's..." Suzy stared at him unfazed "...fine" he groaned, drooping a bit.

His sister smiled warmly, with just a touch of smugness. "Neat. I'll go get the board and the figure store website ready, call you in a bit!" she said, grabbing the bottle beside the canister, filling it up, and taking it up back up to her room.

"Hey! That's mine... whatever." John said, taking a deep sigh. "Guess Anne's necklace will have to wait..." he muttered, opening the canister and filling it up.

Flubber, who had been impatiently waiting for Brie to return so he could explore the house, was getting ready to bound out of the container just as a stream of water began to fill it. Flubber excitedly tried to swim out of the liquid, but his new form was extremely soluble, quickly dissolving in the water. While the slime and nanobots were waterproof at a very small level, and were capable of locomotion, sorting themselves out would take time which Flubber didn't have. After filling the container halfway, John blindly chugged the water down , the contents emptying down his esophagus in a matter of seconds.

That was little tangy. Did it have lemon juice in it? John wasn't particularly squeamish, and gave it no thought. He went upstairs to his room - opposite of his Sister's - and plopped down on his bed, taking a quick nap to get ready for the night ahead.

Flubber was completely confused. First, it was tossed and turned around in its new container, unable to bring itself together as something acidic hindered its progress. It was then squeezed into another tunnel, before being slowly pulled apart into... a human? With the nanobots still able to contact one another, Flubber deduced that it was stuck in the Human's vascular system, being too small to be properly filtered out of it. It would need to get itself together on its own.
As Flubber tried to pinpoint it's known exit points, it was surprised to find that was not the body of a human female. Although Flubber had a nearly limitless capacity for learning and knowledge (if not the fastest), the Sentient Slime Water (SSW) from which it was derived was a very optimized machine. The inventor could only insert so much information and instructions into the SSW without overburdening the nanobot network, so each personality he created was tailor-made to have a just enough information necessary to perform its purpose. As the program for female pleasure was dedicated to only one sex, the SSW, and therefore Flubber, it's knowledge of human males was just basic visual recognition so that the blob could ignore and avoid human males. At best, the SSW would have performed it's job terribly, and at worst, it might have tried to make a hole where one didn't exist. Flubber, however, quickly came to conclude that it was inside a human male, based on the data it had collected of the security guards. Furthermore, Flubber has developed enough of a conscience that it was both careful to avoid harming the male while trying to find a new route out, and the lack of a female in the area prevented its mischievous side from acting up.

Flubber determined it couldn't quickly permeate through the kidneys in it's current form, which would have serious consequences if the male deposited it's urine outside of the body when Flubber was only halfway through. The males mammary glands were also closed fairly shut, preventing escape through the nipples. Furthermore, the eyes ducts, sweat glands, and other tiny holes were not conveniently placed in regards to the vascular system, making those routes feasible but undesirable. Flubber was about to choose an exit through the rectum, but he noticed that a large amount of itself was being pulled by the vascular system to a particular point, right below the pelvis. Inspecting it, he not only found an expandable appendage which was directly hooked to the vascular system, but additional storage in two sacks below, which was hooked up to launch its contents out of the urethra. Flubber immediately began working to get himself pulled back together in these three areas, which seemed to have an oddly similar shape...

John was dreaming of silent session with Anne in her room. Anne approached him on the bed, elegantly taking off her skin-tight sweater, before lowering herself in front of John's naked body. She began to lick his shaft, before taking it all of him into her mouth. However, instead of feeling what he imagined to be the suck of a blowjob, he was instead greeted by a building pressure. Anne was literally giving him a BLOWjob. He tried to move away, but she climbed on top of him, blowing even harder, her cheeks puffing up and down, her face turning beet red, then purple. He tried to pull her head off his shaft, but she refused to let go. The pressure was too becoming too much! John mouthed in agony as he felt-

John shot up in bed, covered in sweat. He looked around, confirming the room was still his, before settling down. What in the hell was that dream about? He thought to himself, rolling out of his bed in his post-dream haze, heading to the washroom between his room and and his sister's room to take a piss. As he walked in and sat down, never standing up after a particular instant that took him hours to clean up, he jumped as he heard an unfamiliar plop on the toilet seat. Tiredly looking down, he shot up with a start, not believing the sight before him. His dick, throbbing visibly, had grown to an incredible size, becoming so hard that it hardly seemed real, yet alone his own.

Taking a grip of it, John was barely able to put his whole hand around it. The veins throbbed, sticking out of the otherwise smooth surface. The head had expanded so much that there wasn't even a single crease, and the foreskin was completely pulled back. Moving his hand down, John further came to find that his balls had become engorged, each one nearly taking up the palm of his hand. Lifting one up for inspection, he was alarmed to find that is had a slightly green hue to it. Is that even normal?! In spite of all this, John didn't feel particularly horny. It was obvious that the dream had killed his libido, but then he should've been flaccid. On the contrary, his dick had actually grown while he had been standing there.

Suddenly, he heard knocking on the door. "Yo bro! Are you going to take your shower? Other people have to use it too. And after I'm done, I've got everything in my room set up to go!"

Oh crap, the stuff I have to help her with! John quickly pulled his shorts back up, but found that his dick got wouldn't even begin to fit. He couldn't even stick it up or down, it would only awkwardly jut out above the waistband. Suzy knocked again. Thinking fast, John grabbed a towel and put it over his head as if drying off this hair, the towel hanging just low enough and fair out enough to hide most of his dick between the two sides. Opening the door slowly, he walked out sideways, facing his room, with his backside turned towards his sister. "I'll be there in a moment, just have to dry off." he said, heading back to his room.

However, before he could make it all the way back, his dick suddenly turned a hard left, nearly throwing John off his feet. Flubber, who could sense its surroundings, noticed that a human female was nearby, and had instinctively tried to reach her. Miraculously, John's dick was completely obscured by his towel, and he was able turn himself back into his room, slamming the door shut. Suzy stared for a moment with a quizzical look. It sure didn't look like - or smell like - he took a shower. She shrugged it off, and went to take her own shower.

At the same time, Brie was finishing getting ready and walked briskly to the door, phone in hand. "Yes Julie, I know it's a three hour drive, but I won't have it in our house for another minute! It's not up for debate!" she said, ending the call. Walking past the counter, she saw the purse was still in its place, and quickly checked that everything was in order. She was about to check the purse too, but remembering the spontaneity of Flubber, she quickly snapped it shut. Listening up the stairs, it still didn't seem the kids had come back home, thank goodness. Just as she closed the front door, John's door slammed with a thud.

John leaned back on his door, trying to hold his suddenly-sentient penis in place. On the inside, Flubber had been pondering why the male genitalia seemed so similar to it, and had finally realized that it was a giant dildo! Flubber still had no clear idea why a human male would have a dildo, but it seemed to have something to do with some weird cells he found in the testes, which were not present in females. Perhaps it was a defensive measure? Either way, Flubber had finally found a use for the male it was inhabiting - to give pleasure to females! With glee, John's dick grew a little bit more, now as stiff as a brick. Equal parts shocked and frustrated, John considered the situation.

Oh god, Suzy's going to think I'm a pervert! How do I get this down, and more importantly, how can I get it back up for Anne!