She was telling Somi that, Rohit was just joking, but isn't Dipika the one who says that, Rohit has given no reason for her to like him.
She knows that, he does cross his limits when talking, she should just not react when he talks about her.
Rohit did make a sly comment about her wanting to have fun in yesterday's task, he did try to add fuel to the fire for Somi, but Dipika just supported Rohit, she does not even care if people are being wronged inside the house.
She never supported Megha and Jasleen and even Somi now, she never stands up for people who are fighting their battles alone.
Just because Rohit is supporting her now, she has changed her opinion about him because he is not saying anything to her.