Now that it is redundant but I think what P meant about not coming in front of K again is that this will be her last chance to prove herself and save this marriage and if K wants this relationship saved then he has to give her that chance...
She will not push this relationship if K finds the truth on a later time...
As far as amma's redemption then there should be none..She should repent for her crimes and P should not help amma as I think her character will be compromised as she will be just a typical female lead who is too perfect and too forgiving despite the trauma she has been put through because of amma