Another thing I just realized. The mother has been bandaged up for 12 to 14 years, since the day of the fire, so that along with everything else Taekyung saw and you really can't say that he didn't know all along that his mother was the killer.
Another thing to remember is that she killed Heeseo's mom and tried to kill Heeseo to cover up a previous murder. So this woman does not think anything of human life, except her own.
Another thing I just realized. The mother has been bandaged up for 12 to 14 years, since the day of the fire, so that along with everything else Taekyung saw and you really can't say that he didn't know all along that his mother was the killer.
Another thing to remember is that she killed Heeseo's mom and tried to kill Heeseo to cover up a previous murder. So this woman does not think anything of human life, except her own.