There’s nothing quite as special as the unique and unbreakable relationship between a mother and her daughter. Mothers want what’s best for their children and daughters look up to their mothers for inspiration and advice. The relationship may shift and change as time goes on but one thing always remains the same: the unconditional love that they have for each other.
Reference: https://www.proflowers.com/blog/mother-daughter-quotes
Express your remorse.
Just about every apology should start with two powerful words: "I'm sorry," or "I apologize." For example, "I know how difficult this has been for you. I feel terrible, and I sincerely apologize." It is important to acknowledge the damaging impact that your words and actions may have had on another, if you meant it your actions will exemplify it.