bawdi and barkat prediction

What i came up with is that suraiya had a sister who married a bhopali...suraiya had a daughter and gave it to her and she had a son(zain)and gave it to suraiya...while her sis and barkat were murdered by bhopali husband..she tries to keep zain safe from his bhopali dad
...thats y she hates bhopal and we can conclude that zain is not their son