As much as we all hate her silence I think that's the best thing to do now because akshara blaming arohi will only get more sympathy for her from viewers which shouldn't be the case
I am sure akshara will blast arohi sometime in the future but definitely not in this case as she is also somewhere responsible for the mess all 3 are in so her staying silent and still loving arohi is a good thing I feel
If she starts lecturing arohi now abt truth and all she will look like a hypocrite as she always knew the truth so good that she was silent