@esha
I think he wouldn't doubt this as a plan, and even if he knows, he would definitely understand that it was nothing to do with him, to make him feel awkward or anything. He does listen, so the cousins can justify their actions.
As for Nisha being heartbroken, I think that's where this is leading. Nisha's parents have already asked her to be ready to fight against rejection, once she realises her true feelings. Now she has confessed, next is the heartbreak. Her cousins, parents and Dadi are with her for support. Even Viraj will support her. So I think she will overcome and may be to distract attention she will focus on shooting.
Sometimes I wonder, why can't Viraj just be the mentor and inspiration, and Nisha can have a different boy for her life. Just a thought.