Koki understood that Urmi did not want to send Gopi back because she liked to use her as a servant and Koki also noticed Rashi smirking twice yesterday at the mention of Gopi in her maayka.. Hence she deduced that Urmi is up to something to harm Gopi and Rashi is with her.
So the retort. Urmi tried to blind side Koki with Kinjal and Koki did that to Urmi with Rashi. So just tit for tat. No bad feelings 😆