Mumbai or shimla

How come arrohi bhabhi ran from the social worker house she was safe there

Is this mumbai or shimla I know the first ep was shot in shimla
Are they still in shimla because it looks like mumbai now
Then for the first ep maybe they shot arohhi deep house part
First in Mumbai then they shot shimla is did arohhi shifted to mumbai
Or are they still showing shimla

How come her Bhaiya bhabhi house got so big

Where deep used to live he came to shimla search for arohhi how did he
Know arohhi was there

And that day when they were going to London
Tara blackmailed deep and he went to meet someone what was that