Maybe I am being insensitive but if we examine Jai's situation coldly and dispassionately, the only thing that really changed for him since he found out Rishi was not his father was his DNA. Everything was the same Rishi had always treated him as a son and treated him equally as Priya and Nikhil. I think maybe it would have been better for him if he had never found out. As Rishi said, when would have have been a good time to tell him, I cannot think of one. It certainly did not make him any happier knowing.