Raped by another 13-year-old?
Not that I know how old her partner was, but it's far more likely that he was around her age
We don't know the father was 13. The article doesn't mention it, though I have been known to miss things. And yes, that is still statutory rape, though I doubt you can charge the boy.
Depending on the law in Florida, it could still be statutory rape.
But I'll bet the sperm donor was somewhat older than she. Lots of predators out there to take advantage of young street girls.