You are doing an amazing job. I was born with a stutter. My father also stutters. I’m 30 years old now. The one thing I can say is be their support system. I didn’t have that growing up and I wish I did. It was just an acceptance thing from my parents. I tried speech therapy growing up but it didn’t do much. There is a low percentage of people that continue to stutter throughout adulthood. Just know that it gets a little better as they get older but you have to keep preparing them. My stutter has her me back tremendously in life due to the trauma that has come with it. Keep doing what you are doing and don’t stop. I have a 6 and 7 year old and I preached to all the gods that they wouldn’t stutter just because I know how debilitating it is. So far so good busy just know you aren’t alone. I didn’t meet an actual person that stuttered until I was in my mid 20s. The second person I met was a teenage a girl at a birthday party for my kids. Just so happened my wife and I were good friends with her parents and didn’t know that this was their daughter. She had stopped me and asked if I stuttered and we had a few hours worth of conversation. No one in her family stuttered so they didn’t understand. No one truly understands unless they went through it or is going through it. Just continue to be their support system