I agree with Dubey's feelings for his son, but is it not wrong of him to want Aarti back for his son when she is now married to Yash and pregnant with his child?
When the PV happened, Dubey was sincere in that he wanted Aarti's happiness, that is why he stopped her from telling Yash about her being a divorcee.
When Prashant came back ill and not expected to live, his heart went out to his son, and that is perfectly normal.
When the hope for P's survival came in the form of BMT from Ansh, he wanted Aarti to tell the Scindias and give permission...so far, so good.
The Dubeys blackmailed Aarti into agreeing for the BMT without telling Yash because of Shobha's dillydallying and then time crunch...and here it was partly Aarti's fault as well as she had no right to go ahead with the BMT without telling Yash. The blame is equal here on all.
But now that P is going to have a second chance at life, is it right on Dubey's or Prashant's part to want Aarti back? NO, they have messed up her life enough and now they need to back off. The truth will definitely come out, and Dubey needs to own up to his part in the whole farce...and leave the Scindias to make their decisions. He should not manipulate the situation to get Aarti back...that is WRONG!
If Dubey truly feels for his son, he should advise him to forget Aarti who has moved on, who still helped him have a second chance at life at the risk of her own happiness, and ask his son to move on as well. Dubey should think of PV for his son now...not break up the PV of Aarti and Yash!