Just my opinion, but the best thing a parent can do for their child who stutters is tell them that it's OK to stutter. I grew up thinking I was broken and had to be fixed. Since it's a mild stutter and she is doing great in school, maybe continue to wait on therapy. Let her decide if she wants to pick it up in the future. Help her become more accepting of her stutter so she can be more open with her friends about it.