Okay i am going to play the devil's advocate here😆
Aditya doesn't completely trust Imlie. The whole pill fiasco is written to show us audience that. If Aditya really believed in Imlie, why would he go to pharmacy and check the CCTV? He wanted to fact check before he supported imlie?
Comparing this situation to Aditya investigating SK and declaring his innocence is skewed. First he did not know SK personally then. He was just doing his job as an unbiased reporter. Here imlie is his wife. Why does he need to investigate her? Doesn't he know her?
He knew prescription was swapped at home. What did he hope to see in the pharmacy? He sees that imlie came into the shop smiling and reasons that if imliya wanted to hurt Malini she would not be smiling like this and would not want to tie rakhi to Malini😆
He did not prove her innocence to anyone. He just convinced himself before supporting her in front of Malini. If he really trusted her, he would not need to go and check.
Even before janmastami fiasco😆. Aditya was in the hall talking to Rupi. He said he and imlie were not talking and wondered if imlie would come and dance with him. This, after imlie went by herself and asked him to practice with her. Rupi declares that what ever fights happen between you two, imlie will never put family's reputation on line. Immediately girgit kumar changes tune and says "yeh baat hum dono jaante hai di.. but kya humara parivaar samjhega?"😆
Imlie on her part wanted to leave after the pill fiasco. She was hurt by BBSB's silence. She wanted some ishaara from SM that she is on the right path. She took NN's arrival as the sign she is looking for and stayed back. Both of them brushed the issue under the carpet and chose not to speak about it.
Also the shooting incident. Imlie declared that Malini is responsible for inciting SK. Aditya and Imlie have a different take on who is more responsible for it. But if BBSB believes her as much as he says he does, why not help her find proofs? Well even if he doesn't believe Malini is at fault, why not investigate and prove to imlie that Malini is innocent? Isn't that what he did when imlie was accused? What is he afraid of now?
We all know BBSB doesn't really trust Malini. Remember he accused her of locking him in the room during BBC. And didi guilt-tripped him and decided to go evil? After that incident he has consciously decided to trust her though his instincts tell him otherwise😆
Subconsciously BBSB trusts imlie enough to go check the CCTV and conclude without any doubt that imlie did not do it. He knows Imlie will never leave him in a difficult situation, so its easy to convince himself on Rupi's assurance.
With malini that is not the case. BBSB is afraid of what he will find out. So he is not checking at all😆
This is a case of misplaced trust. BBSB ignored the oops-i-dont-know-how-i-ended-up-in-your-bed, the dance molestation, the pill fiasco, and the shooting incident. Now didi has grown bold enough to try to pull off a you-assaulted-with-me game😆