Hi, first of all I apologize fir my english. My stutter started around that age, maybe 6 y/o. It was very difficult for me to talk, I had to go to speech doctor, and eventually I could "manage it" more, replacing the words I couldn't say (this was around teenage years). I have 31 now, and you almost wouldn't notice I used to stutter very bad, I still do but just sometimes. That's my experience, it is very difficult to live with this and you become very shy, just be there for her and be pacient ❤️