Probably Taapsee Pannu's finest performance. It tugs your heart. Brilliant screenplay, brilliant dialogues and brilliant support cast.
People here are saying it's just one slap, but underneath that one slap was selfishness of husband, ignorance towards her needs, assumption that he could do these things with his wife and its kinda acceptable, 'Ho jata hai'.
It only worsened from there when he gave those justifications, petitions.
Probably one of tbe finest movies of Indian cinema. Connoisseur's special.
PS: I do think character arc for lawyer could have been better.