Guess, in an attempt to convert their UN-accounted black money, Shauriaya/hisDad and Uncle will raise the prize money and give away 25L to the two runners-up, Mehak & Asmit too. Which is legitimate and Mehak has no reason to refuse.
There has been couple of dialogues of demonetization and Mr.Khanna was wondering what to do with a suitcase full of notes.May be this would be his way of getting closer to his son. Uncle holds the key.May be Karuna's way of rewarding Mehak's efforts w.o being obvious and easing her son's guilt..
Just my thoughts.. the Cvs have been good in surprising us.