Rashmi is far from being a backstabber 😆
Honestly, I was disappointed and annoyed after the episode as well. I still am a bit confused. But I do get Rashmi to an extent.
Like Rashmi told Asim, this is the very end of the journey, and it is futile to do something that could spoil it right now. I also think that she wanted Asim to change his stance on the sanchalan thing. She realizes that while these are the things the Shuklis would be forgiven for, but Asim would not.
Likewise, Asim's reaction is justifiable because Shukla is a grade-A a-hole who thinks he can get away by doing and saying anything, which he has been getting away with in the show.
I just don't want Rashmi to pay any heed to Shukla. That guy is clearly trying to manipulate her. She obviously won't turn into a Shukli, but still.