well i feel both are twins or it could be manyanta was pregnant after keshav's death and nayantara is brinda's sister
or it can be also that since brinda was in temple their destinies switched
or it could be nayantara is from a different clan or she can be Behir's daughter if S3 is connected with S4
its intriguing...
as much i like brinda i am equally interested in nayantara
I don’t think Manyata got pregnant after keshavs death. During the fall she only had one baby with her, if anything were to happen it would have happened during their birth and shortly after their birth. Maybe Manyata did have twins but Brinda was declared still born or something because that pandit might have bribed someone at the hospital to replace his still born child with Manyata’s. Hence Manyata and Keshav believed that only Nayantara survived and that she is their only daughter.