With my theory, if you were paying ANY attention to it, Karin was the mom and she died. So one, shut up and read.
Also, if he really didn't care for Karin, he wouldn't have been able to extinguish the black flames that were said to never extinguish.
Again, why are you here? on an antisasusaku fan page? It seems you are being a little bitch is all. So I suggest you leave.