Really well explained.
In my opinion, she would not have gone so far but Romil's attitude. He was just not ready to accept his fault. He kept insisting he was not wrong and kept arguing which was making her mad. If he would have kept his mouth shut, it would not have gone to this level. On the other hand, Shristy realized that she had done wrong and after initial argument she just kept her mouth shut and was remorsedul.. Thus, Dipika wrath was on Romil. But he has the audacity to say that Shristy was next to her for two hours and she did not say a word. Like really. Shristy is accepting her mistake, you are the one who are still showing attitude. Dipika has the brains enough to pick up the right moment to speak and not when they were in a middle of a host show in front of Salman and Farah. If she really wanted footage she could have done it front of those people but she did not. I loved that she picked the moment when she could blast both at the same times and also show the other HM that you do not go personal.
I think Surbhi, Somi and Deepak were shocked and understood that the line has crossed and hence kept their mouth shut. They have made a joke of her so many times and she never reacted but today when they saw her, they knew that Romil was wrong. Dipika could have easily turned this on them making an issue of Romil's wife and Surbhi/Somi as sister but she did not. Hence it was genuine hurt on what was implied and she never wavered from it.
I loved Shri and KV, showed that it is not a one way street from them. They genuinely care for her and in KV case, also loved him when he went to Shristy to console.