its very simple. she is cashing in on the situation. she stood for gurpreet so as to formr a good image amongst the public which happened n thereafter she has been MOTW for two weeks. if she needs to continue being MOTW she needs an issue hence she is digging up yesh-gur issue again n again n gaining mileage out of it.
as for nandita, she played a ace card there. she destroyed the chances of two kunwars with one strike. now with nandita gone vivek n yash's chances of getting a bride is almost nil. that leaves only two potential jodis pooja-hitesh n pri-raj. now with her making yash-gur meet again n they both falling apart she appears as someone who is a rock solid support for a bechaari gal. this will again brighten her chances of becoming MOTW again.
now lets see her future course of action. since the only other potential rival is rajbir she will eliminate pri if she has a chance next week. then none of the kunwars will have a gal of their choice. tht means pooja-hitesh have a gud chance, n even if pooja is indecisive rumpa who is her 2nd chice is more or less ready. so hitesh's chances of taking the perfect bride will double.
it was disgusting to see her advising vivek's mom n vivek after eliminating nandita knowing tht vivek likes her a lot. by advising other people she wants to form the image of a problem solver n leader where in fact she just manipulates the situation to suit her.
*king*