Hinata

As he looked in he clearly saw his student on her knees upright, with what he easily identified as an orange strap-on on her hips, buried in a beautiful, pale skinned girl with huge breasts and purple hair. She was on her knees as well, but instead of being upright her face was on the bed, her mouth open to the side, tongue out and eyes rolled up, he vaguely thought her name was Hinata, but honestly her name didn't concern him just then.

No he was just concerned with watching and seeing what would happen, for research of course.

But rather then pleased Naruko looked more angry then anything else, and she started spanking the other woman.

"Can't you do what you're told you stupid slut? If you can't make me cum I have to find people that will! You want me to fuck around? Pathetic slut!"

Hinata's butt was turning red but she offered no resistance, just moaned.

Then Naruko froze and looked right at him, of course he had not just taught her Seals, but the hiding Jutsu he used to watch woman.

Rather then stay angry though, or even scarier get more angry, she smiled, and said in the sweetest tone he'd ever heard her use before

"Oh _mas-ter _are you watching us? That's naughty, but that's ok I'll forgive you!"

She slide the strap on(quite a large one in fact at 8 inches long and a good girth), before throwing it to the side of the room, leaving both her, and Hinata, completely naked and just waiting there on the bed.

"I'll forgive you, but you need to do somethin for me first, alight master?"