Blaming your friend for something you did is not a truthful or responsible approach. It's important to take responsibility for your actions and be honest with your parents.
If you're caught doing something you know is not acceptable to your mom, it's better to have an open and honest conversation with her. Acknowledge your mistake and apologize for it. Explain the reasons why you engaged in that behavior, and let her know that you understand the consequences.
Keep in mind that smoking is harmful to your health, and it's essential to consider the long-term effects of such habits. If you are struggling with stress or other issues that lead you to smoke, it might be beneficial to seek support from your parents, a counselor, or other trusted adults who can guide you towards healthier coping mechanisms.
Remember, honesty and open communication are vital for building trust and maintaining a healthy relationship with your parents.