As soon as Rahul started threatening her physical , she had no option to save it. Had she not done it, Rahul was the winner as there is not any doubt that he would not have got it physically. May be the choice to save at some some other place would have been better but strategy worked.
She snatched the physical weapon of psycho Rahul who was supported by salu. She knows she will be bashed but she took the game to a new level.
After all Bigg boss gave a good direction to Nikki otherwise I don’t think Nikki has such a great brain. I still say BB is not scripted😉