I don't think it should come into question anymore after Monday-Tuesday's Episodes. Because I feel that Nandani isn't only thinking about herself. She realizes that 20 years have passed and if she enters Bhoomi's life or gives Bhoomi/Karan some kind of an encouragement or signal about how much they still mean to her, it will want Karan to divorce Tanya. And thinking of Tanya as a dear friend/sister, she doesn't want to break Tanya's home, even though Karan loves her only.
For her love for Bhoomi, she killed Gujral so Bhoomi won't get the influence Ansh got from being with Gujral. And now even for Bhoomi, she is staying away because she doesn't want to create any problems for Bhoomi. She also knows that if she goes to the engagement party, then it may hurt Tanya.
And she didn't go to any party with Aseem. If she would have gone to a party with Aseem, Aseem would be in a business suit not in casual clothes and sitting next to Nandani on the stairs.
On the stairs, Nandani was holding Bhoomi's picture and crying. She told Aseem that its her daughter's engagement tonight, the same daughter whom she never got to hold in her arms and give her love. My heart was torn up to feel that motherless pain she got. Despite giving birth, she didn't get the right of the mother she deserves to give and love. Total unjustice done to her by the selfish Viranis and coward Karan.
Her gift to Bhoomi was a true sign of sentiment. It shows that her intention when buying the gift was just for Bhoomi only. It showed that how much she loves Bhoomi and how much Bhoomi means to her.
And she is also staying away because Aseem has done a lot for her. I am thinking Aseem was there when Karan wasn't there for her. So I don't blame her, as Karan despite being madly in love with her couldn't give her the love and care she truly deserves from her husband.
I wish that Aseeem tells Bhoomi the entire truth because he knows it all by now, and then Bhoomi comes to realize Nandani's worth and sacrifices.
Humaira