This is my POV
Yash is in double minds after the shocking truth of his life has come out regarding his own identity .. At this stage he wants to b fair to all parties because somewhere his inner conscience has a certain guilt that he is actually the result of his father's mistake but even then his family accepted him after the truth and so now he feels indebted to his family but at the same time he cannot really b unfair to his own biological mother Radha either as it goes against his principles ... so a very complicated situation for Yash indeed 😊
Yash wants to keep all parties happy ... He does not want SP to feel guilty about the mistake he committed 30 yrs back simply because Yash knows he is the result of that same mistake and so when SP was getting hyper and feeling guilty in front of family , we saw Yash coming to his rescue 🤔... At the same time , Yash wants to b fair to his brother Akash here since he knows again his birth is the reason why Akash was snatched away the legitimate rights in his childhood and so he takes it like a duty to give those rights back to Akash again by bringing him in the house 🤔... At the same time , Yash wants to b fair with his biological mother too who gave him birth since years back she was denied the legitimate rights by SP and so as a son , he feels its his moral duty to give a proper secure shelter to his biological mother and do his karma this way as a son 😊...
In the process of keeping all parties happy , Yash forgot to think about his other mother Gayatri .. Yash feels Gayatri wll feel proud of him since he selflessly brings her biological son in the house but what Yash is not able to understand here is that Akash's presense will always remind Gayatri that Yash is actually the result of her husband's betrayal which will result in Gayatri suffocating inside since her motherly instincts will always remain with Yash but as a wife she will always remember that Yash is result of her husband cheating on her ... Last nail in coffin was Radha's entry in house in the last scene which shocks Gayatri and this is where Gayatri might further distance herself from Yash thinking he is trying to get justice for his own biological mother 😭😭.. Yash's intention was to make all parties happy and at the same time fulfill his moral duties as a son towards both mothers by returning back Gayatri's real son and by giving shelter to his own biological mother but in the process Yash and even Aarti forgot that Radha shares same equation with Gayatri which mayb Prashant shared with Yash or Arpita would hv shared with Aarti if they were alive and so by bringing Radha in the house they r actually being unfair to Gayatri:the woman 😊
I dont hold Yash or Aarti wrong here because at present both r blinded by fairness and trying to fulfill their duties towards all parites as Yash is feeling indebted to Scindias and at the same time Aarti influenced him never to compromise his principles 😊... But they r not really realising the future consequences and the fact that Akash's presense in house will always remind all of SP's betrayal towards Gayatri whose result is Yash and this might end up in all distancing themselves from none other than Yash only ...
In the end I will repeat again , its a very interesting story-telling because for once I m happy Yash did what his heart told him to do rather than blindly follow SP's footsteps