Hamato Clan Turtles

In instant AU of what if Lita, Zink, Mushroom, Zanna, Jennika and Venus were in TMNT 2012? What if Leo was the biological son of Splinter? (Inspired by a fic I read that I can no longer find... and a fic I saw on Archive of Our Own)

While Hamato Yoshi was getting four pet turtles on his son's third birthday, he, along with his son and a young orphaned girl at the age of four, encounter some strange men and they got mutated along with the turtles.
Yoshi, now Splinter, continues to raise the two children along with the four turtles, who became the kids' siblings.
Leonardo, the biological son of Splinter, did use to want to have a pet but he gained three brothers and sisters while one of the sisters was once human like him and four adopted daughters (one albino turtle and three weasels).
There was Jennika, the angry, but gently older turtle, Raphael, the tempered hot-head he always gets into fights with younger turtle, Donatello, the gifted intelligent genius younger brother, Venus, his younger sister who may or may not be possessed by a demon, and Michelangelo, his youngest wildcard prankster brother.
And his adopted daughters, Lita, the youngest but determind albino turtle, Zink, the on-guard black weasel, Mushroom, the brown weasel who is interested in a bit of science, and Zanna, the playful cheerful whitish grey weasel.
While he still felt guilty and blames himself for his mother, Tang Shen, and his baby sister, Miwa's, deaths, the years go by and on his eighteenth birthday and his, Jennika's and their younger siblings' mutation day, they finally head to the surface with Splinter's permission, but little do all six turtles and the little girls know, that this is a fight they will keep continuing with the Kraang, who were the main reason why they were mutated, and the Foot Clan, lead by their arch enemy and ex-uncle, Oroku Saki, the Shredder.