Dipali tried to make Madhu rethink not to take Radhaji to the party, as she doesn't want Madhu to succeed to get Radhaji and RK together, we may think she doesn't know about Madhu's plan, but she's not stupid, she can see that Madhu is succeeding in changing RK right, slowly slowly his not the same person. She knows next up on Madhu's agenda is to get the son and the mother's relationship to get better, as that's the only thing left.
Madhu dealt with her by taunting her, but to Dipali that was again an invitation for her to come to the sudio and spoil the whole occasion with her presence, as she knows her being there would spoil RK's mood, so even if Radhaji quietly attending the party would not cause RK's mood to erupt for the worst Dip's face alone would see to it that his mood changed, and Dips will then tell Madhu, didn't I tell you that RK will insult his mother if she comes here, and now that is her only objective to make Rishbala unhappy, and for Madhu to never succeed in all that she wants to do.
But all she thought was wrong as she saw that RK is ready to reconcile with his mother, and fed her the cake as well as took the ashirwad sincerely from his mum. Dipali's face registered shock, that yet again Madhu had succeeded.
