1. yesterday's episode Mama ji was making a list of the things covered under insurance for which he can file a claim after the fire incident.
so may be house is also covered under insurance and once he claims to the insurance company that the house burning was an accident, the insurance company will start investigating the same.
I think insurance company will prove that the house burning was not an accident but a deliberate act of mami. hopefully after this mami's truth would b out and her intention of staying in Dev's house would also reveal in front of all. after that hopefully mama takes are or Dev throw her out of his house.
2. during the stay stay of mami and her family in Dev's house she will create rift between Ishwari and Dr.Bose that we already can see.
next I guess her son who has no respect for women will insult Sona..he might be behind her soon..or may be he will start teasing her..and once he is caught by Dev he will be gone..Dev for sure won't like that at all if he disturbs Dr.Bose and he must go for her rescue..after that Sona and Dev's equation should change..
these r my 2 predictions as of now!