In my point of view, Milsi wasn't completely right in his suspicions about Prachi before and after PIM track. He scared her with an attempted rape, insulted her often in front of people, used the rudest possible words for her. Of course most of us have forgiven him for all this after we felt his pain and love for Prachi. Prachi forgave him much before us anyway.
BUT, the fact remains that he committed some mistakes (unknowingly and ruled by anger/revenge/pain) those days and he might have to pay back for them now. The coin has turned around and it's Prachi's turn to doubt on Milind and he has to prove himself to get her back.
Would this be the take home message of the coming track?