Board Thread:Naruto Discussions/@comment-28136690-20160512172917/@comment-26894845-20160519064156

I believe that it was just a special kekkei genkai of hers that just came from her family. Also, seeing how it was filler, and they didn't have all of the cross chakra information we have now at the time of the curry of life arc, they may not have thought that part out that far and just created a new bloodline limit because they could.