I agree that he always had an emotional connection with Imlie and many of his actions were due to his subconscious awareness of it but I do not think that his PDA with Malini was overcompensation. He totally and fully believed that he loved Malini and Malini is the only correct partner for him. and the PDA was the result of that truth. His desperation to get rid of Imlie was also due to this fact that he could not afford or did not want to lose Malini. The bike scene was also a result of his fear that Imlie's presence might affect his marriage.
In my opinion, his true conscious emotional struggle and awareness for Imlie only began after the bike scene and it escalated from there to the first doubt with the alter ego scene that things are not as he thought they are. Even now he is just questioning his action and still is in denial.
The reason I say that PDA was real and he did not think that it was wrong or that he did not have any clue consciously that he was toeing the line is because there was no jijak in his interaction with Malini vs now after the first doubt crept him. In the phone call, he could not say things that used to come naturally to him in the past. He deflected because he could not lie. Second was when Imlie brought up Malini, there was true uncomfortableness there and again he deflected unlike where in the past he would have said something thus asserting the point that Moon is the only wife for him.
I think both things are partly true. His PDA with Malini was overcompensation as well as the truth as he believed it in the moment. Adi is such an expert at hiding from himself that it can be simultaneously true that he was suppressing his feelings for Imlie so much that he was able to deny their existence and feel completely comfortable that what he is expressing to Malini is his truth.
So we may never get a clear answer on how long he has suppressed these feelings for Imlie and when they moved into the conscious realm.....the bike scene was a big trigger point, yes....but it's not like he suddenly developed feelings for Imlie from that point only and there was nothing before......Imlie's loss broke through the solid mental/emotional barriers he had built inside himself to compartmentalize his "truth" as he was comfortable with it.
Adi was able to do so much PDA with Malini precisely because he thought his conscience was clear then.....and the reason it was clear was also because he was so successful in suppressing his true self. The reason he is struggling more now is that the door has been opened to the truth in his heart and mind and now his conscience isn't being able to hide from it anymore.
