if you love your wife/love your husband no harm show affection in front of people,either relatives or parents of the husband and wife...the parents also showing affective to the love one...! cause if u love someone,u wil hug or kiss on forehead or cheek....rather mouth to show obvious...so if u love your wife u can hug whether is in public...and people just ignored what u did...even your parents kissing and hugging..! just to make happening..! i not that kind of narrow minded...! i know muslim restricted cause the act is inappropriate, cause married couple is married,if not marry yet is haram..cause Khalwat,the act for the couple not yet married and have an affair..for me husband and wife kissing and hugging in front family is to make witness from the family to see them their like loving and happiness couple.! other will feel hope they be in love again.!