LOL arey woh implied hai na....she clearly doesn't think the relationship is one-sided if she thinks Adi has given her place to Imlie😆......and she wouldn't be lashing out so much at Imlie with the psycho sindoor stunts if she didn't think ki Imlie ki side se bhi kuch hai. But she is so Aditya obsessed ki she builds all her reactions and thoughts around him mostly.....so her focus is more on how Aditya supposedly left her behind for someone else.
To answer your question....no, Malini isn't going to tell all the Ts that she committed suicide thinking Adi loves someone else....they will be allowed to stay in their delusion ki she did this cuz she felt neglected by Adi. Some of the Ts like Nishant might know and Malini may talk to him one on one about her suspicions....but sabko nahin pata chalega.
That letter most likely will fall in the hands of someone who can be guilted over it or someone who will weaponize it....so yeah, chances are most of AC or Adi/Imlie.....Nishant bhi ho sakta hai possibly.
Bata dia toh kaise mahaan banging watch her twist it and be like accident tha to others 😆 but she will go full on guilt trip adi and imlie ke kaise woh pyaar ko bhuki hai and failed caz time nahi mila lene nahi aaya yada yada.. the letter is so becoming a public show by ac malignant and dragging imlie at hospital and doing her izzat ki dhajiyan but bechari mahaan imlie will still give khoon instead of loser baap who btw has the same blood group caz woh itna nikamma hai