Naruto was eager to kiss his mom's gorgeous asshole, and scuttled under her bum in the bath, pressing his face up between her giant cheeks and locking lips with her anus. But all of a sudden his anal french kiss turned into something more intimate as he was forced roughly against her asshole and his hands pressed against her giant cheeks in an open embrace. Try as hard as he could, he couldn't budge an inch!
"Mmmommmphhh?"
"Oh don't worry sweetie! I've just completed a sealing chakra, sealing your lips to my asshole for the next sixty minutes! Your face will be stuck in mommy's ass while she shits on you, isn't that great!" Kushina squealed, clapping her gigantic cheeks on her little son's head.
Naruto couldn't believe his own mom wanted to do this to him, but he also couldn't resist her huge, chunky ass and would do anything for it, even this!
"Of course, I suppose that should be shitting into you ..." Kushina pondered, touching her finger to her lips cutely.
The kyuubi raged trying to take over Naruto, but Kushina literally smothered the power out of it by letting her giantess buttocks clap together around her son's head and then squeezing, absorbing some of the chakra into her own ass. Then the first turd oozed out of her asshole and thus into her son's open mouth, touching his tongue with an acrid brown hue and causing him to wretch and writhe. Kushina almost came there, but pinched the little turd off and commanded her son to chew and swallow, which he of course obeyed.
"Remember honey, this is your punishment!" The large Uzumaki mother moaned as she squeezed more shit into her son's gaping mouth. "How does it feel being mommy's personal toilet?" Naruto of course could not answer - he had been beaten and subdued utterly by his mother and was now eating her shit. He didn't even have time to chew as the brown, gooey lumps poured out of her hot, filled bowels into his open jaw, and he simply swallowed and guzzled it all down.
"Your face fits so well into my ass sweetie, not even your father was this good a match for it! It's like you were born to be wedged face-first up my ass!"
But just after that tender revelation Kushina slipped and fell backwards into her double-reinforced bath, squashing her son's face and forcing her ass to compact in size to fit in the tub. The result was a world of pain for Naruto as his mom's buttocks fought for the space he currently occupied!
"MMMMMMMNNNNNNNNNNPPHHFFFFF!!!!"
Naruto's screams vibrated up his mom's delicate asshole even as it continued to poo into him and caused her to buck and grind with pleasure. "Oh sweetie! Keep doing that!" She said, leaning back, intentionally putting more weight on her little boy. Any normal boy would've blacked out from the pain and suffocation, but the power of the kyuubi kept him awake and Naruto was able to swallow his mom's poo until his belly swelled up like an anthill and his mom noticed his growing erection poking out under her.
"Oooh Naruto-kun, I told you you'd enjoy this!" Kushina purred to her near-comatose son, "but this is meant to be your punishment, let's try something different!"
Standing in front of her bed, Kushina stood in front of Naruto as she made him kneel behind her in a prayer position. She forced her son to kneel behind her as she drilled him in the face with one buttcheek, then the other, like a pilgrim worshipping his fickle goddess, offering his face to her much-larger ass. Tensing and tightening them into boulders harder than diamond and unleashing their smelly power on his face! To finish off she made him press his face into her buttcrack and then clapped her booty cheeks together again and again on his tiny head for thirty minutes! If her son hadn't had the kyuubi chakra in his body he would have likely suffered brain damage! As it was Naruto had a bad headache, but the two parts of the kyuubi wanted to be closer together so they forced him to pucker his lips and kiss his mom's asshole in thanks! Kushina meanwhile was laughing in ecstacy! She had always wanted to dominate her son like this, the kyuubi had nothing to do with it, but it certainly made what she was doing a lot more fun!
"Naruto honey, come lick mommy's asshole while I decide what to do with you next!"
"Yes mom!"
She spread her immense chubby cheeks and allowed her son to press his tongue against her asshole, licking up and down the full length of her crack. She released her cheeks and they punched into his head with a dull thud, knocking him senseless.
"I don't want you thinking of anyone else in there, Naruto honey! Not that Haruno girl or, even worse, that Hinata! That is MY butt your licking and I want you to remember that while you worship it!"
"Ye-yeth mom!" He replied, his tongue stuck between her cheeks.
A few seconds later his mom was whirling and twirling him around the room, jiggling and shaking, leaping and spinning as she laughed uproariously. Naruto's head was securely trapped in her bottom as she bounced around and swung his body left, right, up and down, into walls, chairs, the roof and the floor.
"Okay sweetie, now I'm going to train my leg muscles on your defenseless little head!"
Naruto found himself on his knees in front of his mom, facing away from her as she sat on the edge of her soft, pink bed. He shook with fear as his mom grinned hungrily, stretching her enormous, muscled thighs, spreading her huge legs wide. Kushina's thunder-thighs would be a deathblow to any mortal, especially so for her son since he was bowing his head in the perfect sweet-spot; a few feet in front of her crotch in the exact spot where her massive quads would bang together.
"Any last words, sweetie?" His mom asked hungrily, patting her thunder-thighs like a wolf sharpening her fangs. Her son was in tears as he couldn't believe his mom was going to do her deadly headscissors on him. "Jus- just make it quick mo-!!"
*KABOOM!!*
The room shook and cracked, the chairs and tables shattered into splinters, the very house had cracked in half from the power of her blow. And Naruto was forced into the eye of the storm, in an eye-popping, skull-fracturing firestorm of pain, instigated to provide his mom with unbearable pleasure. His mom's legs devoured his head, closing perfectly around it, hiding it forever as she howled and spasmed in unkempt lust, getting off on dominating her son utterly. She just about had the control to continue her torment of him by locking her thighs together, grinding what the kyuubi protected of his face between her thighs in her exotic headscissors.
Three hours passed, in the blink of an eye for Kushina, squeezing and squashing her son at full-power for every sweet second of it. Naruto, in tears, only knew that he was incredibly aroused, looking in his mom's wildly rolling eyes and lolling mouth, seeing the immense pleasure her domination of him was giving her.
Naruto could barely move his head, but just managed to budge his mouth out of his mom's leg-clamp. Her thighs, each one bigger than his whole body, incessantly writhed and glistened, plump, pulsing pink mounds of flesh. They coiled like great, slick, fat snakes, profanely grinding the little head between them to dust. Sweat covered his face as his mom's legs crushed it, and his hands were shaking on her quads as he spoke.
"M-mom! This ... feels ... great!"
"Oh honey, I knew I raised you right! You're just like me - there's nothing better than a son who gets pleasure from pleasing his mommy!"
Kushina's quads expanded and hugged her son's face, smothering Naruto in his mom's thick thighmeat. She saw his hands falling as he began to go under, but grabbed them and pressed them against her thighs herself. "Don't suffocate yet sweetie! I want to squeeze you unconscious in my headscissors!" She said, and then grunted and screamed with the effort of crushing her only son's head in her sexy headscissors. Muscles bulged, veins popped and Naruto's screams briefly mixed with his mom's before she crushed his head utterly.
"UUUUOOOOOOAAAHHHHHHH!!" She screamed in wild abandon, bucking and thrusting her hips as her son went under, her massive cunt gushing with juice as three feet away his head was squashed by her legs and his cock overflowed unconsciously.
When Naruto woke up he was bound behind his mom, kneeling in front of her ass once again as her large round heel stood on his semi-flaccid member. He leaned exhausted against her flabby rump, kissing it softly, letting her know he was okay. She pushed his face into her crack and jiggled her buns on his face affectionately. Chakra chains bound his head into her ass-crack as she spoke to him from above. "I know you must be tired from your big meal sweetie, but I thought we would-"