They try out the tongue.

Sakura sat up after a couple minutes, Naruto having been considerate enough to give her that time to recover. "So Master, how about we try out my tongue now?" she asked, having noticed its new texture when she had licked the back of her hand earlier, and of course was now eager to try it out fully.

"Good idea," Naruto replied, sitting down and spreading his legs to expose his stiff erection. Sakura beamed, glad to have been made better for the purpose of pleasing her Master, and looking forward to seeing the results. She crawled over, and planted her hands on his thighs, and lowered her face to his dick, giving it an affectionate kiss first, and then slid her tongue out, and ran it along the underside of his shaft.

Sure enough, Naruto was amazed at how good it felt as the partially softened spines that now emerged from her tongue dragged along his manhood. She repeated the motion several times, making sure each stroke of the tongue was very slow and sensual for him. She met his eyes, and purred audibly as she saw he was enjoying it, and then took his shaft into her mouth, slowly bobbing her head and making sure to keep swiping her tongue on it as much as the limited space allowed, and fondled his nuts.

"Oh, that's good Sakura, keep that up," Naruto coaxed, and she very happily did so, wanting her Master to enjoy her work. He began to buck his hips up to make his dick move into her mouth, and she moaned in contentment as he did so, pulling off after a few times so as to stroke his dick and lick at his nutsack.

She purred as he reached down to pet her head, stimulating her cute kitty ears, before she returned to blowing him, and bobbed her head more frantically. He groaned out, and soon, his seed was gushing into her happy mouth. She pulled off, licking up the spillage and swallowing his cum.

"Wow," he said. "It felt even better than I expected…"

She giggled, and purred out, "I should hope so Master, Kitty here needs to earn her milk after all…" Hearing her talk like that got Naruto's engine revving again.