Till today, i will say that a mum with only boys cannot train all her boys to be calm and gentle children without the help of the father, I don't underestimate God's ability to raise children who will live right for him. But the fear a child will always have in the presence of the dad is another thing we can never look down on. Mum tend to show compassion and can be easily draw to her childs will because of the nature tender heart stuff. Friend training a child to become responsible from parent who get separate by crisis is not possible. So a cooperative effort is needed to train a child to become responsible in future.