How old are you? It sounds like moms still think you're a little girl. Be strait with her and tell her about your journey. You are of age, so she can't tell you what to do with your hair.
I just say Oh okay or nothing at all. I refuse to argue with people about my hair. I did, however, give my brother a bag of straight weave and said that could be his sister from now on. That stopped the snarky comments. I hope you feel better OP.