One thing I would suggest is, to not believe it will go away. Do not get your hopes up, and don’t get hers up either. My stutter has been mild my whole life as well. I am 24 years old and still struggle with it. It’s a daily battle. It does help me to slow down in my speech instead of talking fast. But that doesn’t make the stutter go away, just helps me. I would agree speech therapy isn’t SUPER helpful in my personal experience. I learned techniques such as slowing down, and learned not to avoid words I knew I stuttered on, but other than that, I didn’t get anything out of speech therapy. I was in speech therapy on and off between ages 3-17. The best thing you can do to support her, is just simply being there for her. When she gets older she may have some trouble with so called “friends” who might make fun of her. Remind her that there are people out there who will love her no matter how she talks. This is coming from someone who has a stutter and is married and has great friends. Having a stutter shouldn’t hold her back from normal life stuff. Just love on her, be patient with her, and comfort her when those tough times do come. Because I can’t guarantee they won’t come. Oh another thing, do not interrupt her. I know I can speak for several other people in my life who stutter and we HATE when people interrupt us. We understand we take a little longer to get a word or sentence out, but interrupting us can make the stuttering worse.