Well,even if Pia can be redeemed, some boundaries when crossed,can be forgiven but never forgotten. You know if Pia was under the assumption that Bani had divorced Jai when she had the ONS and she did not drug him to set it up,that can be forgiven, how she dramatized the fake shooting to hurt Bani, well even that as sick as it as, could still be forgiven but to set up her sister to take the wrap for a murder she did not commit, to take her sister's children away from her and have her committed to a mental asylmn, to go to the asylmn and add torture to her everyday, that could never be forgotten, this is why after taking this character to that much on the other side, it would be like saying the devil can be redeemed. This is why it would be very difficult for people to believe she can be, the trust is gone, the family broken.