Ghar ke Laxmi Betiyaan on Zee - the return of Pavitraa

Today was a strange episode of this serial. So soon after Pavitraa was literally made an outcast, she is again brought back into the mainstream of the serial. Yuvraj had met this pretty girl called Niyati, and married her. She settled very fast into the family, and started getting along very well with the others (and this was inspite of Pavitraa trying to kidnap her to keep her away from the marriage). Soon after, Niyati declared that she was pregnant, and lo and behold, everybody started to anticipate the heir to the household. Pavitraa could not stand any of this and she started plotting how to get rid of Niyati. And she finally managed to get Niyati out of the house and into the open, and of course an accident was bound to happen.
The accident killed Niyati's child and also left her unable to conceive again; and this was a killer for the household - where would the heir come from ? And of course, Pavitraa has a baby growing in her from the time when she was with Yuvraj, and she is ready to become the heir generating mother for the household. Except for Menaka and Niyati (why does the daughter in law always out of guilt agree to such things ? There are so many other options available nowadays as IVF, surrogate mothership and so on), everybody else is against this. However, you know what will happen. Kavitraa comes back to the household, all ready to do her manipulation again.
In a side drama, Menaka is getting blackmailed by her own brother, who finally reveals that Yuvraj is not her son; Menaka in fact gave birth to a son. If this is the case and this gets revealed, this will be a massive shock to the entire household and change Menaka's position in the household.