I know for their tadka , they changed situation according to their requirements but I am also one of the person who believe that pallavi fell first when the story was going in an organic way.
I felt this way in lion track when they were having subtle eyelocks. Raghav was focusing on Ved having pallavi security in mind but I noticed that she started to fell for him when she looked at him with an unnamed emotions on three occasions
First one is when she tended to raghav injuries after accident
second one is during holi when she visited RR mansion to take amrutha and he mistakenly applied colours on her. Instead of getting angry or annoyed they both looked at each with so much calm and peace on their face like a forming a new friendship
third one is during shootout with Ved . Raghav was clutching pallavi by shoulders and she looked like at like it was for the first time she was experiencing a person of opposite gender has held her in romantic way like to protect her from her all worries
these are my personal opinions 😊