Now coming to the show, for Ishwari it is a matter or life and death. If Dev lets Sona sit in front when he has maa with him, that means he doesn't care anymore about his responsibilities towards his family due to new rishta with Sona 😡 don't know how she equates these rare scenarios into one. I can see another flashback on this one from Ishwari mata probably showing how 8-yr old Dev would not let anyone sit beside him other than his mother.
I for one wish Dev tells her, maa tu peeche baith jaa aaram se, Sonakshi tum aage baitho. Let her sulk at the back when these two have a romantic time in the front. Jal jal ke rakh ho jayegi ye dekh Ishwari.