The direct way.

Karin snatches his limp cock with her right hand, pumping the organ vigorously enough that it shoots up in her hand. Her pace then turns to one of painful slowness.

Karin giggles, "Your expression is quite cute, Naruto-kun."

"Errm," Naruto sits up, but Karin pushes on his chest.

"No, no, no! Relax! I refuse to allow you to get up."

"Umm Karin-chan, are you alright?"

"Never better," she giggles, glancing back at his cock, smiling as it grows stiffer and stiffer, "And you Naruto-kun? I know you've been working so hard today."

Naruto winces as she squeezes his cock briefly, "Ah, Karin-chan... you're acting a little strange..." he was pretty sure one of Orochimaru's henchmen wouldn't giggle like that.

"I-I know," she moans, taking off her thick frame glasses, "I feel so weird... but it doesn't feel good to worry about that. I've been doing what Ino's said would help... and you know what? It has. I've been so good to Hinata-chan... she has a very sensitive pussy you know? Much more sensitive than Tenten-chan," she giggles, "Though I guess Tenten-chan likes things being inserted more..."

"U-Umm I know..." Naruto mumbles, "But I really don't think you should listen to what Ino says anymore, I don't think she's acting in your best interests,"

She giggles, "Oh you're so caring Naruto-kun," but shakes her head, "But Ino-sama is so wonderful you know? I wish she were here right now... I would so love to have a threesome with you and her..."

"T-That's great Karin-chan. Maybe we can do that some other time?"

"Oh we'll have to..." she says dreamily, the pace of her jerking hand increasing.

"A-Ah slow down Kairn-chan, I'll cum?"

She slows down, apologizing.

"Sorry Naruto-kun, I was just fantasizing..."

"L-Listen Karin-chan, if you'll do something really important for me, I'll f-fuck you really good, alright?"

Karin's eyes light up, "Anything!"

"Promise me you'll try really hard to remember who you were, alright? Even if you don't like that person... even if you don't think I'll like that person... I promise to fuck you... if you promise to try really hard, alright?"

Karin bites her lip, her hand stopping for a moment.

Karin lets go of him for a moment, her curvaceous body leaning sideways as her hand goes up to her face, fingers resting on her chin. The girl thinks about this for a few moments before smiling widely.

"Alright Naruto-kun, I promise... but you better fuck me really good!"

Naruto smiles slightly, wondering if this approach will work better. He leans into her and kisses her savagely on the lips.

Passion turning to lust, their kisses meander and he travels down her breasts arms and thighs, spreading her and tasting her sex, finding to his surprise that Karin seems to enjoy clamping her legs around his head and neck.

When she's trembling everywhere, Naruto pulls away and enters her slippery sex moaning as their bodies unite under a ferocious desire. When their bodies spasm, Naruto fills her, satisfied to see the woman orgasm in his arms.

Before she falls asleep, he reminds her what she promised, then lies her back in the bed, his cock exiting her sex and creating another mess on the bed. He just shrugs, walking away and out of the room.

That's when he hears a sound.