Naruto tells her.

In a heavy voice, "Do you want me... Karin-chan?"

...

Her body shifts on the cot. She's staring back at him.

"Do you know what will happen if I fuck you?"

She nods slightly, breathing heavily, Anko's and Hinata's scent hanging in the air. It must be confusing her in her weakened state.

"If I fuck you," Naruto says huskily, "You'll be Ino's..."

He gets up on the uncomfortable cot, his cock a fifth of the way into her tight entrance.

Karin moans, panting. Does she want this? Does she?

The rest of Naruto slides into her.

Karin groans, surrendering.

Naruto fucks her with urgency.

His body seems to hum with need, his mass colliding into hers; body's acting as one as he pistons in and out of her. Emotion floods Karin, clouding even the most simplest of thoughts. She orgasms, losing understanding of where she is, who she is. All she can do is moan or twitch under the barrage of feeling overwhelming her.

Naruto is frantic, his head light, his arms are around her back, lifting her up, their bodies merging as her legs come full circle around his hips. She's on his cock as he's standing up, making everyone of his powerful thrusts pierce deep into her.

Desperation ending, Naruto feels that spike of pleasure, a pause, and then, he cums, ending it all, Karin flailing in his embrace.