What's happening in Saloni Ka Safar

For the first time for a long time in Hindi Serials, I am at a loss to figure out what is happening on the Zee prime-time serial, Saat Phere - Saloni Ka Safar. At a time when Saloni has got pregnant, she suddenly starts feeling dizzy and faint.
And then the unthinkable happens. With a promise about her musical career, Saloni, whose life is all about her husband and relatives, starts misbehaving with all of them, to the extent that she speaks to her mother-in-law badly, does not attend Poojas at home, and horrors of horrors, tell Nahar as to whether they can postpone having the baby (imagine Saloni saying that she would go in for an abortion now !!). Nahar is positively disgusted with her behavior, and Saloni also starts belittling the young girl given shelter by Nahar, reminding her about her low status (something that you would not expect from Saloni).
And you always keep on wondering about how these people can never learn; all of them know that Kaveri can never reform herself, and yet they keep on overlooking all her issues. So, after getting to know that Kaveri had taken somebody else's baby and claimed it as her own, they kicked her out, and then got her back after Saloni pretty much convinced them; and now Kaveri will again try and do some mischief against Saloni.
Back to Saloni's behavior, it might be that she has been told that she is affected by a terminal disease, and that is why she is attempting to push Nahar away from her and towards that young woman. One can never understand what the motive is for characters inside Hindi serials.