"We'll be back in a bit. Be good for your babysitter!"
Jim watches his mother and sister leave the house for a short trip. The pink-and-grey rabbit hasn't been feeling the best, so he's opted to stay home.
The 12-year-old bun sits on the couch and lets out a little sigh. He'd really prefer to just have the house to himself, but he figures he should at least wait for the sitter to show up before he goes to his room to play video games all night. 
His enormous bulge slouches down between his legs, large but not nearly as large as it would be without compression boxers on. It's amazing that they manage to hold all of it, really.
After a moment of waiting, the front door slides open. Jim looks up, and his eyes briefly widen.
Walking in through the door is a 20-something fox with pink fur, a slim build, and enormous breasts barely contained under her shirt.
"Hello," she says in a sweet voice, "You must be the little one I'm watching tonight, right?"
"Yeah, that's me," Jim responds awkwardly.
"Alright, good. I'm Callie; I'm your sitter while your mother is out tonight," she introduces herself.
"Jim," the bunny states his name in return.
"Do you need anything, Jim? Want me to put on a movie?" Callie asks.
"No thanks," Jim responds, "I'm just gonna hang out in my room."
"Alright, sweetie. Just come get me if you need anything," Callie says as Jim walks off to his room.
With the little one she's watching out of the way and nothing to do for the night, it doesn't take the babysitter long to decide to have some friends over. They're usually good about not making a mess, so she doubts the family will even find out about it.
Just 20 minutes later, five ladies of similar age and build to Callie enter the home.
"Hey, welcome! Good to see you guys," Callie greets them, "Just don't dig through anything since this isn't my place, and don't go in the kid's room. He'll probably be in there all night."
PEWPEWPEW
Indeed, the little bun is quite occupied entertaining himself.
Jim sits on his bed, controller in-hand, playing one of his favorite games.
Just as he's approaching a highscore, he's briefly distracted by his bedroom door opening.
BEEP BEEP GAME OVER BEEP BEEP
"Oh, sorry, this isn't the bathroo- Woah" a cat with a sleek white pelt is standing in the doorway. Her eyes are fixated firmly on Jim's boxer bulge.
While Jim is still caught off-guard by the woman's sudden appearance, she walks up closer, "What did you stuff your boxers with? That cannot be your-"
She pulls his boxers down a little to check, and the full size of Jim's hyper cock flies up from his pants, no longer compressed by the boxers.
SHLLK
As it rises, it catches her arm, and it begins sucking her in.
"What the- It's real? You can do that?" she says in amazement.
"Oh, yeah, I can," Jim replies, trying to sound nonchalant.
"Have you done it before?" she asks curiously, tugging on her hand a little but only sinking deeper in, up to her shoulders.
"Yeah, with like toys and stuff," he responds.
"And you just pull them out after?" the cat asks.
Jim hesitates for a moment. "Yeah, I just let them out when I'm done," he says half-truthfully.
"Fuck, that's... That's really hot~" the cat replies, stuffing her other hand in, "I gotta try this~"
SCHLLLRK GLRP
The boy's shaft pulls her in quickly, her head rapidly disappearing, then her shoulders. In seconds, the cat is bent over with her top half stuffed down Jim's cock.
SQULLCH SCHLORP
In just another moment, her feet are lifted off the ground.
"Holy-!" Callie, who'd come to check on her friend, watches from the doorway with her hand over her gaping mouth, "It's huge!"
The sitter turns and calls to her friends, "You guys gotta come see this!"
The other four of Callie's friends appear and file into the room after her.
Murmurs fill the room as the ladies surround Jim, "Look at that thing!" "He's eating Stacey with it!" "How is a 12-year-old that large?"
They all circle him just in time to watch his prey's legs disappear down his shaft.
SHLRRCKL GLRRPLLG SLOSH
Moving shapes form in Jim's balls as the Stacey settles in, drawing all eyes to them.
"So this is safe?" One of Callie's friends, an owl, asks.
"Yeah, I've put plenty stuff in my balls before, and it never hurt anyone," Jim can't help but give a mischievous grin at his own sly half-truth, but it goes unnoticed with everyone so focused on his massive member and bloated balls.
The women all stare and chat amongst themselves, each wanting to see what it's like to slide down, but none having yet worked up the courage to try.
"Fuck it, I'm going in next!" a golden retriever says, stepping forward. Her tail wags in anticipation behind her.
SHLLKRK
She grabs beneath the head of the penis with both hands and stuffs her face into the bunny boy's shaft. Her entire head disappears instantly, the cock hungrily slurping her down the moment it gets a grip on her.
GLRRP
The dog's arms are pressed to the side of her torso as her upper half disappears into the shaft.
Jim leans back on the bed, moaning with pleasure as his urethra is stretched out. Several of Callie's friends around him have slipped a few fingers into their pants to pleasure themselves as they watch.
SCHLRRKLP SLRRUSH
The dog's wagging tail lifts up with the rest of her and sways with excitement as it vanishes from sight. Soon, only her legs stick out of Jim's cock until they, too, vanish.
The second of his babysitter's friends slides down into his balls below, and the little boy lets out a huff.
SLOSH GLLORP
Jim's balls are alive with movement as the two play around inside. 
A line has formed of Callie's friends, all wanting to go down his shaft. The babysitter herself watches from the corner of the room, though she can't help but finger herself at the sight of everything going on.
"How many of us do you think you can fit?" asks the mouse next in line. She's not quite as tall as her peers, but she's just as busty.
"Umph- I dunno, but I really want to find out," Jim replies.
"Me too~!" the mouse says before turning her tail towards him, "Now lets see if I can-"
SCHLLLLLLRRRPFF
"Oh wow-!" the prey is pulled in up to her butt in an instant, the pred's cock slurping up her tail as soon as it catches the end of it.
SHLRRGPHF
Her juicy ass is engulfed next, stretching out the tip tremendously wide. The mouse folds forwards as she's pulled deeper in, her lower legs and giant rack still poking out.
SLLRPHG ULRG
"AH~!" Jim can't stop himself from letting out a sharp moan from the intensity of the feeling as, after a moment of struggling to get all of her down, the rest of the curvy mouse is gulped down his shaft all at once.
Before the exceptionally wide bulge even makes it to his balls, the next girl in line is already staring down his cock, her wings wrapped around it tenderly.
The lustful owl puts her beak to Jim's urethra, mentally preparing herself for what she know she's about to do. Before she has the chance to really steel herself, though, it begins to pull her in, the bit of her beak poking into the dickhole being all Jim needs to start slurping her down.
SGLRRK SLRG
"Mmh! Mmm-" she briefly panics before becoming too aroused to worry as her head and shoulders are sucked into the warm, soft tube.
"Mmh~" she reaches one wing down to pleasure herself as her upper body is pulled firmly inside the shaft.
SHLLRG SLORSH GLLRRRGP
It doesn't take long for the rest of her to become a bulge sliding down Jim's cock to join the others in his balls. The subtle movement of the owl's wing as she pleasures herself is barely visible in the bulge she makes on her way down.
SLRRRSH SLOSH GLRRRP
Jim's sack wriggles and squirms in all directions as its occupants play inside, feeling up the walls, splashing in the bunny boy's cum, and getting intimate with each other.
A deer with a large pair of jugs but a shy demeanor is last in line, Callie still standing back fingering herself to her friends' fun with the little boy.
The doe looks quite nervous, standing before the enormous member and full, squirming sack.
"Don't worry," Jim says between pleasured moans, "I can- huff- fit two more~"
"...If you're sure," the deer says, stepping closer.
By now, Jim's balls are massive with their four prey already squirming inside. His shaft lays on top of them, the tip barely drooping over the top of them with how full they are.
"I guess I'll just..." the doe gets on her back and presses one hoof into the urethra, "Oh~!"
SCHLRRRK
Her entire lower leg slips inside. Emboldened by the erotic feeling of it, she stuffs her other leg in quickly. "Goodness, I-... Oh this feels good~"
SLRRRRPCHK GLORRP
It doesn't take more than a few short seconds for her to get in up to her waist. She begins to moan openly as she sinks deeper and deeper into the shaft.
SHGLRK
Soon only her upper torso remains outside of the 12-year-old's dick, which points straight up from the intensity of Jim's erection. The doe's tits rest on the head of the shaft just above the urethra that will soon swallow them, and her arms drape down the sides of it.
"Oh fuck~! Take me! Stuff me all the way in~!" the deer shouts, her inhibitions melted away.
Jim is lost in the pleasure of the fifth busty woman sliding into his cock, but he manages to reach up and use one hand to shove her deeper in. Once her tits are inside, there's no resistance at all.
GLRRRRRP
As the deer joins the party in Jim's balls, Callie finally approaches the little bunny, "Oh my~ This certainly isn't what I expected when I signed up to babysit you, but I can't say I'm complaining~"
The bunny boy rubs one hand over his squirming balls, "Gonna join your friends, then?" 
"Oh, I can't resist~" the babysitter replies, "Get me in there~"
Callie gets on her back on the ground in front of the boy's shaft. She slips both paws inside without hesitation and begins to finger herself as she's slurped down.
SCHLRRKP SLRRG
It doesn't take long for her to be pulled in up to her waist, then to her chest, gasping for breath between moans. "Best... babysitting job... ever..." she manages to say before the rest of her is pulled into the 12-year-old's ravenous cock.
SCHLLLLRK SLRRRPHFG SLORSH
With all of the ladies having vanished into his shaft, Jim's balls have grown to enormous size. His sack wriggles and squirms with bulges constantly moving along the surface of it, the result of six eager ladies getting it on inside.
"Huff..." Jim puts both hands on the sides of his cock and slides them up and down as much of it as he can reach. The movement inside is indescribably pleasurable, and he can't help but let out moan after long, sharp moan.
GLRRRGLLE SLOSH SPLASH
Inside, the playful and aroused women gradually begin to lose color and form. Cum drips down the sides of their bodies like sweat, and they get softer and softer.
They hardly notice, though, all of them awash with pleasure, rubbing their melting bodies together, cunt against cunt, breast against breast, lips against lips.
They continue in this way until their bodies become soft bulges in massive pools of cum and then nothing at all.
PLAP PLAP PLAP
Outside, Jim feels himself getting close to orgasm, his balls the fullest they've ever been, loaded with what's left of six whole women.
Not wanting to splatter them all over his room, he drags his full balls towards the window and opens it with one hand, keeping the other on his monstrous member.
PLAP PLAP PLAP
He aims the tip out the window, setting his rod on the sill, and he unleashes a huge load of cum.
SPLRRRFPPLLLRRR SPPPLLLRRRRT
Thick strings of spunk fly out into the grass outside, dense with the entire bodies of the women melted down.
PLAP PLAP PLAP
The little bunny boy sprays the visitors all over the yard for several long minutes in a continual, powerful orgasm. What's left of the ladies pools into a puddle in the grass.
When he's finally finished, he's left a puddle of cum wider than a kiddie pool seeping into the ground outside, and he's huffing with exhaustion.
Jim closes the window and puts his boxers back on, stuffing his giant cock into a much smaller bulge inside them. He moves to his bed and drops down to rest and recover from the intensity of the occasion.
Looks like he has the house to himself after all.