20Akudou - a Naruto fanfiction story » what if being in the womb while having a bijuu sealed inside give someone more closeness to the bijuu. Naruto have kurama's chakra, eyes, and the same mark on his face. giving him a kekkei genkai of being able to create illusion that is indistinguishable from reality. And Kurama acknowledge Naruto as "her" son thanks to this, and decide to be a mother for him.