Over these ages, I doubt it. They already have around 17 years and seem, even physically, very childish.
And being sent out to go on missions as young as 5 where you had fight to live, isn't?
Kakashi was a made a ninja at 5 years old, Itachi and the Sanin at 6, Minato and Kushina at 10, Sai at 11, Naruto and his age peers at 12....
marrying at 15-17 is much more "normal" even in the real world than that. You have to suspend your real world modern high tech world cultural concepts of adulthood. It's been emphasized many times in part 2 of the manga that: it's now time for them to become the adults their age status says they are in Naruto's world. Kishimoto made it clear with the conversation between Chouza and Chouji that includes marrying and starting families... They are now old enough.
I think Sasuke, if he lives, will be redeemed and end up renoucing his clan and letting the "cursed clan" die out. He shows no interest now in passing along the clan to another generation- he wants to wipe everyone out essentially. If he's redeemed he's going look at the dangerous insanity in his clan and decide it should pass from the world with him.