Originally posted by: Nafs_Sweetheart
It's to divert her, throw her off the scent that they are planning to leave in a few days.
What Dipali heard before was Madhu mentioning that he didn't need to taunt her and throw her out of the room as they just have to tolerate it for a few more days more, and he quickly stopped her talking, he knows Dipali very well just with that information will understand what they plans of leaving and will disrupt the plan, she will do something to Madhu as Madhu is very innocent, Dipali will can put something in her head or feed her something, Dipali is the sly one and Madhu the innocent lamb.
So what we heard in the precap is to play Dipali's game RK is trying to inform her that all he is acting as a good husband is just a matter of days then Madhu will see his true face that he doesn't love her, but that can't be right, we have seen too much in the show of RK's love for Madhu for me to ever believe he doesn't love her. It's just he knows Dipali's ways and is trying to fool her.