Board Thread:Naruto Discussions/@comment-24577388-20150224012723/@comment-27082825-20150225164128

I forgot where, but I read that on this site. Tsunade is their grandchild. Tsunade's parents are never mentioned so we don't know their case. Also, please don't classify information you simply haven't obtained as speculation. You're saying nothing was stated when even if I'm to be wrong, it'd be more likely to be something that was said that you haven't heard/seen over something that wasn't stated at all. Neither of us know absolutely everything about the series.