I don't stutter, but I am the mother of a beautiful girl that does stutter. This is how I interpret what happened if that's okay to share. I would bet she sees your struggle and feels deeply for you. Behind the scenes your parents will cry for you, they can share those feelings of frustration that you feel, but they won't divulge it to you. I won't do this with my daughter because I don't want to compound those negative feelings she has. I hate watching her struggle with something she cannot help and never asked for. We do everything in our power to be your rock. Sometimes we'll convey that appropriately and sometimes we won't, we're only human. We believe in you and want the best. We'll tell you to keep going and keep your chin up because we never want to discourage you, and because we believe in you. Perhaps you can tell her that you understand she only wants to be encouraging but sometimes that can come across as dismissive and it hurt your feelings. It's okay to feel your feelings if you're struggling, but as a parent I just never want to see that consume my child. Hopefully this lends some perspective.