Tells her to strip naked.

"Alright Hanabi, take off your clothes so Master can see your body," Hinata said, already stripping herself naked.

"What!? There's no way I'm going to do that, and why did you just call him Master?" Hanabi asked, not immediately noticing that she was already working on undoing her top. "Since when did you get so per- what the!?" she finally realized as she started to pull off her top, leaving her in her mesh shirt. "What am I doing!?" she demanded as she then reached down to unbutton and unzip her pants.

As she shimmied them down, Hinata had already taken off her jacket and mesh shirt, leaving her boobs for Naruto to view in their naked glory, and she blushed a bit when she saw Naruto looking.

Hanabi stepped out of her pants, and undid her sandals. 'What is going on?' she thought, now only in her panties and mesh shirt, already reaching for the hem of it. 'Why can't I stop myself from doing everything my sister tells me to? And... Why do I kinda want to show Naruto my body?'

The shirt came up, exposing her own tits, not as generous as Hinata's, but still well developed, and she dropped the shirt, before finally hooking her thumbs in the waistband of her panties and sliding them down as well. She was mortified, but still couldn't help but pose herself in a sexy manner, running her hands through her hair behind her head.

https://thumb-p5.xhcdn.com/a/VB5BBIxS5PuV7kQ4Iroxpg/000/293/817/525_1000.jpg

She smiled at Naruto a little, momentarily getting lost in the fun she was having, before returning to her senses, and quickly covering herself with an arm over her breasts, and a hand covering her snatch, and was crimson in the face.

Hinata, already nude herself and kneeling by Naruto's side, gave a shy giggle as they considered what to do next.