Help reg. the synopsis of last 2-3 months

I've missed PKYEK the last few months due to the pressure of completing the last sem at college and the exams! SO many things have happened in this show during this period that I'm not getting some of the developments...I know that there has been a leap recently but my question is that Piya seems to be included as a part of Dobriyal family and she now stays at their place and also calls Arnav 'papa', so when and how did Panchi and Misha get to know that Piya is their half-sis? 😕

Can anyone tell me about it, or better, let me know the date of the episode in which the revelation to Panchi & Misha was made? 😊

in a prom night occasion...panchi was at home...and arnav-panchi shared some father-daughter moments...and being drunk he tld panchi how he loved a girl...married her...but he was coward could not fight for his love but run away from situations...but he still loves her very much...he never told her the name but just his situation...panchi got a lime light of his past life...

in marriage anniversary of arnav-madhu...misha gets to know about piya being the dauughter of arnav through arnav's mouth...and how he loved piya's mother...it happened abhay was about to steal a cd that contain some facts about arnav-sugandh relationship...kabir saw him going up to the study room...he told misha...misha caught him...they misha behaves rudely with abhay...piya defends abhay...that hurt misha...misha-piya argues...misha accidentally pushes piya towards her cupboard...and she was filled with blood...seeing that state...arnav took her in his lap and reveal the truth how much he loves sugandh...and piya is his daughter...misha-panchi gets to know everything about arnav-sugandh through madhu...panchi accepts piya easily because she knew how much arnav loved sugandh...but misha got a bit difficult to accept it...because she thought everyone betrayed...she even went to the extend of going out of the house...abhay-panchi...madhu even piya herself all tried to convinced her but in vain...but when she gets to know about arnav's accident and he was fighting for his life and death...she got a eyes opened...and accepts piya as her sister...now what you see in the leap is the result...dobriyals happy family...

main person who set everything up is definetly abhay...if he never steal the cd and break it...we would not have seen the beautiful bond of the parents and sisters trio in the leap...they were awesome as friends...but being sisters they rocked it...