I think this is the child she gave birth to when she was in Jail for RASHID's murder! The women said 20 years ago? The timelines in this show are SO messed up anyway? Aahil is 30 but the Mother went to jail 15 years ago? But the kid is like 8 or 9 in the flashbacks?
IF this was her kid with the Nawab, then I guess it is sort of OK? She can tell Aahil that she was pregnant and she gave birth but thought the baby had died? But what if this was the child she gave birth to when in jail for Rashid's murder? That is proof she was in jail once before! That is the jail she escaped the day she murdered ASYA, Najma and Gaffur!
But she seemed HAPPY to hear about this child? How is she planning to bring THIS kitten into her fold? Kitene bache hain Iss aurat ko aur Kaun hain unki Baap? Ek Najayaz aulad kum thi kya? NOW see Aahil...Aapki pujya Ammi ki nayi harkat! Lol