I have seen the montage, didn't find any wrong in it. My POV is Arjun and Purvi are Pari's parent, so this montage is representing the universal relationship of a parent with their kid, so what's harm in it? and beside when the incident of her coming happened, neither of them got married to another person..they were committed to each other already.
It's very unfortunate by standing in 21st century that we can't give respect to Love. Whereas single mothers are still unaccepted and kids before marriage are still not wanted