He is turning into yet another spineless Sharmas. Why does he maintain his silence at critical moments? He could have spoken out when the other family first raised the "rishtey ki baat". Then he kept silence as Mandira was railing at Indira, and then when Kutumb. He then rolled his wheelchair off in disgust. He should have said some comforting words to Indira and Rishi and then given some privacy.
It appears that CVs do not know what to do with him. They are in catch 22 situation. They had to portray the Indira-Vidith bond as extremely strong to lend some drama to Rishi Indira story. Now that this function is over, tehy cannot have him be allright becuase that takes away the whiole raison-detre of Indira's "Hitler" personna as well as her need to be the primary bread winner of teh family, forever sacrificing herself for them.
Thus they have made him sort of a spineless sharma.