Suppose if Sharmila is alive and due to complex if she hate Mangai what will be the reaction of Mangai. If she is so possessive with the child she should tell the truth to everybody in the family and agree to marry Devesh. Instead of that she is ready to get marry somebody and control Devesh not to marry and who is she to control Devesh. Ridigulous.
The doctor also interested with Mangai. Arivu is also giving pressure to marry Nikil. Devesh hates Mangai. In this situation she is much worried about the child since is she is genetic mother.
Mangai is creating new problem, she has no right to demand the baby now, and no rights at all to threaten Karbagam/Devesh. When comes to baby she is not thinking right.