RPS knows Raj's parentage?

Reasons

1) Neighbour of Priyanka ex secretary Arjun said RPS had come to visit her twice in basti

2) He was defending Arjun right, left and center and never listened to anyone when they said kid should leave house

3) He was acting so casually at knowing Arjun is father of Raj(seeing his previous behaviours to everything related with Arjun) he would have reacted angrily if he did not know the real truth. Because he knows Raj parentage or has some idea he did not call and ask Arjun any clarification on the reports

I think Arjun, RPS and Dadi all three are in this together

OR

RPS has some idea on this whole issue else he would never allow Raj to stay in house

OR

Only other option is the mother is not priyanka but someone else and Arjun and RPS/dadi had told her to go to hostel and meet as Raj's mother with hostel authority to hide real mother identity. That is why RPS used to go and meet Priyanka in her basti. If Priyanka is real mother she will never disappear like that and Arjun and RPS would have never allow her to resign from their company and leave without trace. They are powerful enough to find out where she disappeared without knowledge but they did not bother for 2-3 months. That may be because she is not Raj real mother.

I feel there is very less chance that RPS is Raj's father beacuse in hostel application form its written RPS is grandfather not father and Priyanka had written it. If its RPS child why will Priyanka(assume she is mother of Raj) write father as grandfather

The way Michael was telling if i was in Arjun place i will never do this means he also may not be Raj father. Michael will never allow his girlfriend to give birth to his kid and there is no need to hide the child parentage if its Michael's. Also he is a direct suspect as he has openly admitted he has many GFs and in serials and movies open suspects are rarely the culprits

I think Jignesh is more probable suspect and the way he was saying RPS has gone to change will and may put Arjun and his kid as heir to everything. RPS has seen real result of test and really knows Raj belong to Singhania's hence gone to change will and phoned lawyer next day only