The writers and some watchers must have been tired of hide and seek games played by durga and Sakshi and they wanted to show good winning and the bad losing. The rot started with Rajnath blackmailing Sakshi. One thing led to the other things.
Shaurya and Dev share some common traits as cousins. Impulsiveness. While Sakshi and Durga share some common traits like waiting for the right time.
Hiding something in the piano must have been borrowed from some hollywood movie or some innovative idea from the creatives? If it is the latter, I must congratulate them.