She is not ready to be a parent... THEN YOU SHOULD NOT HAVE SEX!!!!!!! the baby is not yours, it is a special person.
We know next to nothing about the circumstances surrounding this pregnancy. This girl may be mentally challenged. She may have been molested by a stranger or a member of her own family. Even IF she willingly consented, a 13 yr old is not mature enough to make such a choice, i.e. statutory rape. I think it’s short-sighted and a little naive not to think she’s being very firmly pushed into an act of which consequences she cannot possibly understand.