Is Renuka really forgetting or is she pretending?

In a TV soap, the negative or grey characters don't face any health issues, especially the sickness of forgetting.

If she is really suffering from memory loss, how she has the same hatred for S & S.

Renuka always loved women who is from a rich family.

Yes, she loved Kalyani simply because she portrayed herself as a Dubai return girl who is from a rich family.

However Roshni got exposed 3 times out of which she was thrown out of the house twice.

She got an entry for the second time in Deshmukh family only because of Tejas. He loved Roshni inwardly and also consummated his marriage during the court case. He eventually accepted that it's his child.

Just because Roshni lost her child and wants to secure her stay in the Deshmukh family,she swapped the child.

Renuka also told Roshni in the recent episodes that if she intends to bring Krish to Deshmukh House, she will throw both of them out of the house.

I think she is pretending to be forgetful. Please give your views.