Mishti had accepted Ishaan as her father, the situation is very complicated for her, I don't think she even knows what she should think, her first reaction is anger...
When a child of Mishti's age is angry about such a huge thing, Mauli should give her some time, some time to understand her own feelings, if I think about it from a child's perspective, her whole world has changed, it's not as small as a child demanding chocolate...
Even Mauli and Kunal's condition is different..
Kunal was in a happy marriage, his wife died loving him and their daughter, they were happy, he can handle Pari better because there is no turnpike of emotions. Nandini didn't die in a day, so he came to a point where he understood that he can't do anything about it..
Mauli was in a happy marriage, Kunal left her when she was 3 months pregnant, that tells you they never had any problems in their relationship, it was a sexually active relationship and out of the blue Kunal slept with Nandini within month of meeting her, how is that Mauli's fault?
The thing is that she herself doesn't know the reason Kunal left her, Kunal never gave her a closure, what can she tell Mishti, when she does not know anything?
Why should she tell Mishti the truth where "Kunal loves her"?
But we have to understand Mishti's mental condition right now..there are two possibilities
1 Mishti fearing that Ishaan will leave her - If we are understanding that kunal loves Pari more than Mishti and it's natural then why don't we understand that Mishti loves Ishaan too? She has spent years of her life with him, she is connected to him as much as she is connected to anyone in her family or more, he has been there for her.
So telling her that kunal loves her will increase her fear of losing Ishaan
2 Mishti is feeling rejected - In this situation, it won't be wrong to tell her that Kunal loves her but how will Mauli explain his absence?
Are we really expecting Mauli to put her relationship with Mishti in jeopardy for Kunal's sake?
Chalo, they tell Mishti that kunal loves her and Mauli takes the blame of separating her from Kunal, so now Mishti does not like Mauli and she can't live with her father because for his father Kunal Pari is a priority and Pari can't share her buddy.. One more rejection for Mishti..
What exactly can Mauli tell her in this situation?
I feel Mishti should be given the time, I don't think Mauli should lie, just tell her the truth.. But all in good time