Goddess: Reincarnated as Naruto's Sister

She was called the Ice Goddess in her previous world, how will she survive in Naruto's world now? The goddess reincarnated into the belly of Uzumaki Naruto's mother, but there was not only her but also Uzumaki Naruto in her belly. Yes, they were twins. After her birth, she became Uzumaki Naruto's sister. What kind of world is this, and how does she live? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.