So from episode and precap, I am able to make out the following:
So this Abhimanyu is the man stalking Kallu and kidnapping Moksh. So he is creating a security threat, only save Kalyani from the security threat. I feel he'll blame all of it on Meenu like all these hamlas are happening because of her, let Meenu escape from jail and come as Kallu's appointed security guard.
Also seems like he's sabotaging all KalMa romance and creating issues for Malhar at work so he stays busy and away from Kallu. So I feel if pregnancy track is happening, I think it'll be shown that Kalyani is 4 weeks pregnant or something cause all future romance will be sabotaged by Abhimanyu. And news of pregnancy will send Abhimanyu over the edge, and I feel he will reveal his true colors.
Anu is noting something suspicious about Abhimanyu, I feel her focus will be on that especially if Kalyani is pregnant, and she will pay less attention to AnuSar beti.
Moksh as per precap already feels ignored by KalMa, so KalMa baby and AnuSar beti will only make it worst.
As for Asha, she has come with a big plan. AnuSar beti was her trump card as Gayu said. I think when AS gave the child away, she thought child was dead and maybe did it to protect Anu. I feel it was Asha and Ahir that maybe bribed doctors to say that baby was dead in order to kidnap. Cause Moksh was also kidnapped around the same time as AnuSar beti so I feel this was a big plan by them for revenge and getting all the Rane pariwaar property, which Ahir always wanted. Or else how does Asha even know all of this? Once AnuSar beti is found, she will make her way back into Rane pariwaar.
You have listed down aptly..
From the way this Abhimanyu is behaving seems he might trap Kalyani using Pillu and ofcourse he has a scape goat Meenu.
As you say Asha and Ahir may have masterminded the kidnap of AnuSar daughter and now she is using that to get out of jail. But am wondering why Asha didn't reveal it or shout it out at the time she was arrested for the Murthi racket. She could have gotten Sarthak to help her then itself.
Lastly, staying in the hostel, if Moksh is feeling the loneliness, then it's going to be very easy to manipulate his little mind against KalMa for any of the villains.
Abhimanyu can instigate him against Malhar to get Kalyani for himself through the child.
Asavari can use AnuSar beti or potential kalma kid do it just to create family misunderstandings..
Atharv if at all returns can also use it.