BTW there were some continuity errors. When Ruhi reprimands the brothers, she tells that that Simmi is at Sarvodaya hospital while actually she was long since back and some drama also happened after that. Even Rohan was witness to it.
Second, why did Simmi leave the house?! There was no need for it. Raman never told anything to make her take that step. The Simmi Aliya scene looked so disjoint form the revelation scene. Aliya did not even try to stop her from leaving the house. It looked so messed up.
The only way I can reason Simmi leaving the house is that Shireen is busy perhaps with some other work.
Shireen is not in mumbai
And it seems long term
So simmi went away
Well atleast it was better as compared to normal stuff we get nowadays