My 2 cents for future speculation:
Adi-Imlie marriage truth is the one which is going to be revealed the last. This is the pivotal truth that is the cornerstone of the story & will only be revealed in the end.
Now tomorrow we will get the DC being Imlie's father truth reveal. I don't think there will be any separation between Adi-Imlie due to this. Imlie will not care 2 hoots for the Loservedis except for Dementor Didi. And she already does the highest level of Didi jaap. So I don't think that now with her believing that Didi has moved on with KC, that she will go away from Adi because of DC being her father.
Next will be Didi-KC truth reveal. I think revealing that Didi has been faking loving KC is required to realign the T family in favour of Dementor Didi & for Imlie's insecurity & crushing guilt to rise its ugly head. Adi will not be affected as much with this truth except that all his progress with bringing Imlie to the sach reveal team will go down the drain & he will have to deal with Didi jaap from all sides.
Currently in the story the T fam is seeing Adi support Didi strongly even while they are divorcing. So once they come to know that Didi was only faking her affair, they will once again be on the Adi-Malini milan team. Imlie will once again feel that it will be better for everyone that Adi-Didi stay together. Hence she will try to leave once again.
Adi is going to be the wild card that will be the driving force in the story then. Right now he is all complacent because Imlie is with him, he is getting divorced from Didi easily, his family has also moved on from Didi jaap & Imlie is once again being showered with love by the family. Hence his confidence that they will accept Imlie as bahu after some naarazgi. Hence he is able to give token declarations to Didi about gehri dosti & being her support. Once his family tries to sic Didi on him once again, he realises that Didi is still hoping for love from him & Imlie tries to leave him then he is going to be the belagaam ghodi once again.
No one from the Delhi side has yet seen Adi's love & junoon for Imlie. Didi has conveniently forgotten that the first truth that Adi actually revealed to her is that he loves Imlie. She is deluding herself into believing that he only wants to nibhao his rishta to Imlie because he was married to her first. If that was the case then he would never have married Didi. The marriage to Imlie is now sacred for Adi because he loves Imlie & their marriage is the thing which binds them together. Imlie & his love for her is the priority & not the marriage itself. No amount of guilt is going to force him to ever leave her.
The T family has seen his extreme concern for Imlie but only in case of her education & when she had gone missing from C house. They are still believing it to be him fulfilling his responsibility. They take their improved equation on a face value. They are going to get a big jhatka when Adi is going to be adamant about his divorce to Didi. Their continued pressure to reconcile with Didi & Imlie going away from him is going to make him reveal the truth about his marriage to Imlie.
Once that happens then let's see how the Ts will tackle the situation. They truly love Imlie but Imlie -Didi being actual sisters & Imlie playing the role of a househelp for so long is going to add society being judgemental about their family pressure on them. We have already seen how they tried to keep Imlie away from them when AC accused Adi-Imlie having an affair & Adi-Malini marriage was disintegrating. So though the elders will feel for Imlie's plight they might want to keep the status quo maintained & ask Adi to consider only his marriage to Didi as the valid one & stay with her.
Uske baad only they will really get to see an Adi in love. Adi toh taandav karne wala hai if Imlie tries to go away. Tab hi Didi & Ts will actually realise the depth of his feelings for Imlie. But all this is still away. I don't think the Adi-Imlie marriage truth will be revealed for at least the next 30 epis at least. Let's see what happens. I am forever ready for chop of my speculations from the writers😆.