Possess through going up her Vagina (Belly Expansion Version)

Naruto fazed in through her window and watched as Sakura put on her signature red dress. A mischievous grin crawled across his face. "If I'm gonna possess her, I'm gonna do it in a way she will NEVER forget." Naruto thought to himself. He smiled as he floated over to Sakura.

She still had her back to him, since she was brushing her hair and looking into her mirror. Naruto floated down underneath her and looked up in between her legs. "Oh~ what's this? A black thong huh? Who knew you were such a pervert~?" Naruto smiled. He then flew up between her legs and said, "Now for the second part of the Jutsu, KANASHIBARI no JUTSU!" He says after making the hand signs.

Suddenly, felt her body go stiff as a board and wasn't even able to move her mouth. Naruto giggles seeing that it worked, he starts by sticking his fingers in as Sakura shudders internally. As her cunt is stretched wider with Naruto's entire hand stuck in and his fingers entering her womb, he watches in fascination as her abdomen beginning to expand despite his spectral form. He then shoves his other hand into her womb to stretch her further open as pushes his head in.

Meanwhile, Sakura looks on in horror and arousal as she looks at her belly growing to the size of a grapefruit. But her arousal only continues to grow as her belly expands, now the tripled in size as Naruto shoves his head in. Before she knew it, her arousal has taken full control as she shouts internally, 'Yes! Yes! Harder, deeper, keep growing! Feed my hungry cunt, stuff it more~!'

Naruto makes another big push as his shoulders enter the womb, making her climax even harder as her belly reaches the size of full pregnancy and her bellybutton popping out. Her red dress, having finally giving up, explodes off her naked body. She continues to ride her high, not even noticing that she's regained control of her arms and quickly puts them to work as she rubs her right breast and tweaking one of her swollen nipples as the left arm goes down below, furiously rubbing her clitoris.

Naruto hears her pants of arousal and sees her womb beginning to flood, he smiles knowing that he brought Sakura to a level that Sasuke never could. With that thought in mind, he hurries up and pushes once more as she cums to the feeling of him entering up to his hips, his member throbs as that push lands his dick between her ass cheeks.

Sakura looks down at her belly, now having regained full control of her body, goes ahego as she unconsciously goes to her bed as to get into a more comfortable position. Her womb has now been stretched so far that looks like she could give birth to twins at any moment, but with her massive size she can no longer reach her flooding pussy as her left hand moves onto her other breast.

She suddenly jolts at a new feeling of ecstasy assaults her body, not from her pussy, but from Naruto begins hotdogging her ass. He swings his hips back and forth rapidly, with each thrust also pushing him in deeper and as his spectral dick came, his hips follow the rest of him into her babymaker.

After her fires off his round, he calms down and decided to finish up. With that in mind, he concentrates his chakra into his hand to to better grip her insides and pulls the rest of him inside. As Sakura was hit with biggest growth spurt yet, having grown twice the size of her body. At that moment, she came harder than she ever thought physically possible, her vaginal fluids nearly having sprayed onto the ceiling.

As she comes down back to earth, Sakura suddenly remembers remembers the original reason for her earlier fear and slowly looks down at her belly in dread. However, before she could let out a scream, gasped feeling one final orgasm coming. Larger than even the previous one, as she sprays literal buckets of girl cum and watches her monstrous balloon of a belly deflates her fluid continue to rush out, turning her room into an inch tall puddle. The only remaining proof of her massive chain of orgasms, aside from the floor, was he still slightly bloated belly.

With Sakura thoroughly exhausted and her will depleted, she lets out a quiet moan of pleasure as her entire world went dark before Naruto opened his eyes and found himself staring at Sakura's reflection in the mirror.

"Wow, this is weird," Naruto commented. He looked down at Sakura's body, noticing it for the first time. She wasn't too bad, although her lack clothes made her look shapeless. He wondered why she didn't show off her beautiful curves. Naruto felt her body up, and then noticed the hot, dampness between his legs. Sakura had been excited before he entered her.

(He thought, unaware that the her curves had expanded from absorbing what was left of the cum that had remained in her womb until now)

"Well that was messier than expected..." Sakura's voice came out of his mouth. Naruto looked down at his new body, "Time for some fun!" He grinned. As he removed the scraps of clothe that was Sakura favorite dress, he hears a wet sloshing sound from below. He watches as her swollen breast audibly sloshes, she bites down on her nipples and begin sucking on her glorious tits. She blushes deeply, knowing exactly what to do next...