No body can always be right and nobody can always be wrong. Good thing about SGP is that non of the characters are envy of each of other or jealous, Suhana is loved by all , no matter what they love her,there love has changed Suhana,s heart in accepting them, Rajni and Disha stood up for Suhana infront of Sona, where the family were not bothered, even Suhana didn't know what bothering her, they always pampered her, she is not the daughter but daughter in law just like Disha and Rajni but they gave her special treatment always, they would have never screamed and shouted at her if they themselves were not extremely worried. In a joint family everybody have to take care of each other wether they are smart or not, wether they are pretty or not, wether they are experts in household job or not, everybody have there own way of contributing. You can not just break plates when ever you are angry believe me you will not get away with in real Sasural,even if they are good inlaws or bad, Suhana is the lead character, very sweet but she is not perfect, just as Rajni and Disha are not evil. They would gave been evil if they said to Suhana that you do things yourself. They would have been evil if they plotted against her many time, but they did not, when she was sick, they cried with her, they pampered her, they asked her friends to cheer her up. Suhana is a pure heart we all love her character but how would we feel that even living in the same house we are not given any notice by the elders for anything but our other sibling gets all the praises, we will be fine for a whole but eventually we would feel left out, would it make us evil? Suhana is not at wrong here , behaviour of Disha and Rajni are inappropriate but the reason behind is not wrong.