Board Thread:Naruto Discussions/@comment-26320097-20150423120614/@comment-26338100-20150423133754

I dunno, I saw that Kishi comment too, you don't neccessarily need to be "blood" related to be considered a Mother to a child.

I can see something like, Sasuke and his group were looking for Oro, Karin got killed and Sasuke took her to Sakura to raise. But so she isn't raised in ridicule (as you know how cruel kids can be, look at Naruto's own childhood) he married Sakura. Sakura is a nice enough person to raise someone elses kid, especially if that child was Sasukes.