Mona doesn't need to react in this way all the time - if you cry for one, then you were really fond of that person but if you cry for all, it just seems too fake.
Mona 's isnt faking at all. I don't remember Mona crying for Aadesh Srivastav. Mini and Tupur were her friends...thats probably why she broke down. Now as far as the rest is concerned I doubt whether she will cry for MIKA and the rest...its a wait and see ...
So lets believe Mona felt bad for her friends.