In the early episodes aired in August 2012 period, I remember Radhaji explaining to Madhu, RKs hatred for her after her marriage to Kuku. What she told Madhu was that after MK's death she was unable to take care of RK alone and so married very soon after MKs death without even waiting for a year, so that RK wud get a secure life and a father figure.
In the episode of 29th August 2012, where Kuku is stopped by RK from giving Madhu shagun, Kuku tells Radhaji that he supported RK and Radhaji after MKs death and RK is thankless. This clearly means Radhaji was never a wealthy woman and married Kuku for financial support.
Had she been wealthy she wud not have married Kuku in such a hurry.
RK after his 4 phera marriage, even talked about his family to Madhu saying that its his mansion and Radhaji and his step family were staying there and living off RK.
Now CVs expect us to forget that Radhaji married Kuku for financial help and all of a sudden she has become a very wealthy lady with retrospective effect all thanks to driver Rashid.
What a BLOOPER by the CVS. Which means this plot was never intended but just created out of the blue.