A mother is the first guide of the child. She is the living form of God on earth. She is the one who teaches us and protects us from any evil. She forgives us for our mistakes and holds us at every step when we go on the wrong path. So if you had done any mistake that made your mother sad, just say sorry for this because she can easily forgive you. It is better to write a letter of apology to make her feel better and express all that you felt after hurting her.
Here is a sample sorry letter to mother:
This letter is not enough to show what I am feeling by giving you so much pain, still I am writing this letter to let you know that I am really sorry for my behavior and for bringing tears in your eyes. It was my first and last chance of taking alcohol and I promise that I will not drink ever again.
Mom, you really mean a lot to me and I truly value the sacrifices you have made for me throughout my life. The education and the values that you have given are imprinted on mind and I will never forget them. Yesterday, when I was with my friends, they played a prank with me and mixed some wine in my juice. I drank it and it resulted in hang over. When I came late and found that you were still waiting for me, my blood stopped flowing and I was so fearful by the thought of facing you in that situation. At that time I wanted you to scold me but your sad eyes explained me that I broke your heart by my act.
If my words can give you even a little comfort then please mom accepts my apologies and gives me a chance to prove that I inherit all the values of our family. Please believe me mom that this time I will not let you down.