It sounds like the bigger picture is that your stepmother doesn't treat you with respect.
How you raise your children is your decision and she should respect that. She already asked you about your child's name and you very nicely let her know what you had decided. She chose to ignore that. It sounds like she has a history of this type of behavior with you. If so, I can see where you would be sensitive to it.
Some people are so fixated on themselves, that what they think and want is the only thing that's important. Other peoples rights and feelings just get trampled along the way.
I have no advice for you, but you have my sympathy. You can try talking to her, but if she chooses to do as she pleases, your only recourse is to ignore it or put your relationships with both her and your father at risk. Sometimes, just realizing what the problem is with a particular person, can help you recognize your hot buttons with them and help you tolerate the person, even if you can't change them or the situation. :aww
How you raise your children is your decision and she should respect that. She already asked you about your child's name and you very nicely let her know what you had decided. She chose to ignore that. It sounds like she has a history of this type of behavior with you. If so, I can see where you would be sensitive to it.
Some people are so fixated on themselves, that what they think and want is the only thing that's important. Other peoples rights and feelings just get trampled along the way.
I have no advice for you, but you have my sympathy. You can try talking to her, but if she chooses to do as she pleases, your only recourse is to ignore it or put your relationships with both her and your father at risk. Sometimes, just realizing what the problem is with a particular person, can help you recognize your hot buttons with them and help you tolerate the person, even if you can't change them or the situation. :aww