"I want her to be my child..."
Lady, you're drunk. Please don't bait me with such wholesome words. This is not the right manga for that.
Called it, she's gonna be living with them and paying the rent by being Tiana's teacher. Well, that's exactly what I wanted to see, so that's good. She's not gonna be "mama" though, just "onee-chan". Yeah, I have to remind myself occasionally that this is technically not a wholesome manga headed in a wholesome direction.