You know... I think it's sweet. *feels alone*
I don't think it should happen officially or anything, like Toshi said, it just wouldn't fit with the story right now...
But I've always considered Tsunade to have a nurturing love for Naruto. Sisterly or motherly, it doesn't really matter. But it's obvious to me that she loves him and sees a lot for his future. She also believes in him greatly. And I think, yeah, if explored deeply, Tsunade would look at Naruto as kin. She gave him the necklace, he carries the dreams of her love and little brother. That says a lot right there about how much Tsunade cares about Naruto.
Originally Posted by Uchiha1412Toshi
Only children need parents.
Naruto isn't a child anymore, and doesn't need motherly care. It would've been better if he had an unofficial parent when he was more of a child, but he did have Iruka as a fatherly figure when he was an older child. Now he's grown to be a young adult, and he's able to stand on his own, without parents. He's lived 15 years without parents, though painful, he knows from the start how to take care of himself.
Sure. I see your point but I don't think 15 qualifies as an adult... at all. Naruto's at the age where he needs guidance and some restrictions. And I think, say Tsunade did become Naruto's adopted mother during the story for some odd reason, Naruto would accept her care happily and be glad to have it. Those 15 years of living alone, must have a left a yearning inside of him for a family. Something, that I think, is obvious about Naruto's character.
And really, adults need their parents too. For support. For advice. For reassurance. You can be independent, but at times, you'll need your parents (or friends). It'd be wise for everyone here to realize that.