Board Thread:Naruto Gaiden/@comment-1018594-20150610113403/@comment-734582-20150616131941

Matako wrote: It's completely baseless. No, it's not. Experimentation is pretty much what Orochimaru does, and it's his entire goal in life to acquire all jutsu through discovery and experimentation. Orochimaru's experiments made Sasuke immune to poison, so clearly he's already been experimented on. DNA acquiring happened before. Karin's been a hoarder before. There's plenty of base for all of this.

I don't see why you're so adamant about this, based upon just one piece of information (the test). there's several chapters to go and enough vagueness around. i'm simply not *convinced* of either being the mother.