The second reason why parents don't let their son get emotionally attached to his wife is their dominating nature and their urge to control their child's life.Many people are dominating by nature they want everything to happen just as they want,everybody should obey them without asking questions and their commands and wishes should be fulfilled without delay.Now it is possible that only mother is like that or only father is like that so one parent is there to pacify children but if both are of same nature we can easily imagine that situation.