Someone setting fire on a person is really really a BIG thing.
These do not normally happen in normal household with normal human beings.
Dilshaad being the elder one in the family should take these incidents seriously and try to talk to tanu to understand how these things happened. It only makes sense coz she is also a woman (more empathy), she is close to tanu and she trusts her too.
I know CVs want to show Asad taking care so Asya MU be created but I don't understand why they are not showing Dilshaad even trying to talk to tanu. Its not normal.
Dilshaad is not Shireen to overlook things happening in front of her eyes. CVs are doing a bad job with tanu MU track leaving out so many stuff and totally going out of characters. They conveniently forgot that Asad knew about Zoya fire phobia !!!