this comes from experience working professionally with children, so please take it as that and not as speaking from a parents' perspective... i might react totally differently if i was a parent of this child...

if it ain't broke, don't fix it...

for many children, the trauma of abuse is multiplied by the investigations that follow the abuse... retelling your story countless times, being re-molested by professionals trying to assess any damage to your frail body, learning more about the human body than you were ready to learn... even with all of the specialists trained to minimize these impacts on children-- there are still a lot of hacks out there who absolutely are doing it wrong... and end up doing more damage to these kids in the name of "justice"

memories are SO fragile and i believe in the research that supports that memories can be created -- that means, if nothing happened, or if something happened that she hasn't even held on to as significant, going through scrutiny and evaluation could put negative associations in her mind with this event, with other girls, with sex, with whatever, whatever, whatever...

I agree 100% with the poster who said to take her to a pediatrician and move from there... there are many kinds of molestation... .penetration to manual stimulation to (like the other poster's said) show me your's and i'll show you mine... you need professional guidance plus your gut instinct to decide whether this is something to pursue or dismiss...

i'm sure I don't have to tell you ...there are potentially huge consequences to both sides of this coin...

also, this will be controversial, but there is a lot of research suggesting that children w/only 1 instance of sexual abuse/molestation end up fairing the best out of all abused children -- that isn't saying that their wouldn't be consequences... just saying that most go on to have normal lives... this research takes into consideration the amount of people who report an isntance of abuse but have never required treatment, have never had a disruption in normal functioning, etc...

i'm not intending to downplay anyone's abuse or minimize their response... just saying that's what some studies have found... for each individual, the outcomes may vary greatly from the averaged findings...

good luck with your decision, i don't have kids, so i can't imagine what i would do... i'm sure it would involve flipping the freak out...

be well!