sorry i am not a parent but i have a large port wine stain including my lip. had no treatment
its great that she is accepting. kudos to the parents
you did a great job there. if it is she can answer her friends questions maybe there's a very good chance she will understand that your not fixing her face but making sure that the PWS will not grow and hurt her ?
sorry i'm not great with kids but thats all i can think of. It will grow and to prevent that it needs to be treated.
again great job with her. at 5 years thats awesome