Yeah, I thought she was sexually abused or something like that. But I just have hope that the mother and the uncle have no relation or shared blood (That can sometimes happen, an aunt marries a man who is basically an uncle-in-law). I've never read the manga, I've watched the entire anime and I know they're different. And I don't approve of them doing it at all, I'm just hoping it wasn't incest because that would make my stomach turn.
What...sana's mom did it with her UNCLE and what's more, she was just FOURTEEN????!!!!! Sana doesn't mind about it but If i were her, i would have never forgive the "mother".