All it takes is a little push

Karin hesitates, the last bit of her will struggling to get the upper hand. But in that moment, Naruto makes her mind up for her. He pulls back and slams himself into her again and that single wave of bliss is enough to bury the last of Karins resistance under the wanton lust for pleasure.

As her mind begins to change subtly already, so does her body move in accordance to Naruto as he picks up her legs and she wraps them around his hips while he presses her with the back against a wall. Then and there, he begins to thrust his hips into her wet core over and over again, eliciting cries of bliss from her.

Naruto hears Inos voice again, applauding him to his success, but the voice grows quieter until it is not more than a faint whisper, one Naruto would have to strain himself to hear. But right now, even that is hard as Karin is ecstatic as her free will slips more and more out of her and she greets it with gleeful joy as Naruto fucks her harder and harder.

She moans his name under her ragged breathing, but she can barely gasp for more air because Narutos thrusts grow more savage. At the same time, Naruto can feel a change within him. It feels as if concepts such as fatigue and restraint are slowly being replaced by an insatiable, instinct-driven desire for more.

And this new instict tells him to give Karin his gift, to give her what she obviously craves for. After some more few minutes, Narutos cock twitches inside Karins pussy and they both get the release they so desperately need. "Accept it, Karin-chan... allow it to happen!", he calls out to her as his seed enters her womb and the chakra begins cursing through her body.

Karin goes limp in his arms and he smiles. He can sense that she has given up resisting completely as he thrusts more and more of his chakra-imbued sperm into her.

Finally, Naruto feels that his cum has begun to work inside her. Gently, he places her body next to Hinata on the bed.

On the outside too, Naruto is now beginning to change. The whiskers on his cheeks grow darker in color and his eyes also take on the color of red, with his pupils becoming slitted, all indicating that the Kyuubi now has gained control over Naruto, or rather, they are now acting in unison.

Mildly surprised, Naruto notices that his cock is still erect, even though both Karin and Hinata are filled to the brin with his cum. His lust stirs once again as he sees his own essence slowly leak out of them and he knows he wants more...