I think we audience will have to show a lot of patience for Imlie in the coming weeks because her care & concern for Malini above her & Adi's happiness is not going anywhere anytime soon.
More than Didi being mahaan to her because of her good deeds, it will be because Imlie empathises with Malini.
Imlie was Adi's wife but Adi negated their marriage & went ahead to marry Malini. Malini became Adi's actual wife. Even though her & Adi's marriage was a forced one, but it was still a valid one for her. She anyways was very hurt & lonely after her forced marriage but Adi giving the haq that was rightfully hers to Malini was very painful for her. That is why she was crying throughout the marriage ceremonies of Adi-Malini.
After their marriage she compartmentalized her pain of being rejected & replaced by someone else & that pain is still alive within her. She now wants to protect Malini from going through the same pain. Hence, her not wanting Adi to break his marriage with Malini. She herself has lived through various pains throughout her own life & can live through this as well. As to what of Adi, then she must think that he also loved Malini once & can grow to love her once again.
This I think is the major part in her reluctance to accept Adi fully & to allow him to separate from Malini.
So what she needs to realise is that staying in a marriage where your husband doesn't love you will be even more painful for Malini. Also it will be equally painful for Adi to try to love & stay loyal to Malini when he loves Imlie.
Another aspect that she needs to realise is that their marriage has other reasons due to which it is not working. I think till now it was working on some level because Adi used to give into Malini's demands to compensate for his guilt for not revealing his forced marriage truth to her & his suppressed feelings for Imlie. Otherwise their marriage would not have lasted the way that it has still now also because we can see what Malini's thinking of a good husband & marriage is. Her self centered & attention seeking behaviour would have rubbed Adi off in the wrong way in the early days itself because he is not someone who takes crap lying down when he is in the right.
So when she comes to realise these things & understands that separation is the best option for Adi & Malini's happiness then only she will allow herself to let go of her own guilt & embrace her own relationship with Adi.
So let's brace ourselves for Imlie's Didi Jaap.