The Monster Inside Me Book 1

This fanfic involves Leo x Karai and Donnie x April, but no smut or lemons, this story involves a little romance but nothing more.
Leo and his brothers finally free Karai and they take her home. Karai finds out that Leo was told to raise a little girl named Chole (the girl from tmnt 2012 episode: Slash and destroy) after the death of her parents by Shredder. Everything goes well and everyone is finally happy now that it is peaceful, but how long will this peace last when some family members starts to disappear? Leo and Chole must face things they thought were impossible but now common. Can this struggling family stay together and fight the pain or will they crumble to theirs deaths for the ultimate sacrifice?