Well.....
Mulan has already given you her experience.
It will feel good to share, but ultimately, she will not be able to do anything other than listen. In fact, at that age it's possible that she will be scared off, scared for you and tell her parents, you may have an argument and she could tell others (and warp the truth)

I just see no benefit besides you letting it out....and I see risks.

Just my opinion, of course.