Even if

Whatever if she is pregnant or not
If it's aaliya plan, Pragya should use it in her favour
N if she is actually then also she should make it in favour
As she has some idea that aaliya will definitely plan something against her
She should tell abhi, she can't disclose father's name because she has to talk to him first, then she should plan something to make his memory came back, doctor from us which Purab was talking about??
Or recreating some situation that can help

PS this news has to be true, she can't fake for long, Tanu will definitely ask for sonography like she was asked to do while she was pregnant