
Quoting
cbg
The answer is very easy, but it's not the one you want.
There is only one way, and one way only, for a teen under the age of 18 to emancipate in Florida, and that is if HER PARENTS sign the petition. It will not happen any other way. If the parents do not agree, then emancipation is off the table.
If the parents do agree and willingly sign the petition (and this means both her father and her bio-mother), then the next step is for your girlfriend to show how she, and she alone, with no assistance from anyone else, can pay 100% of the market rate for rent, utilities, food, clothing, medical care, insurance, transportation, staples, school fees and supplies, and all the other incidentals of life, while still going to school and getting better than average grades. Moving in with you and/or your family (I know, you didn't mention this, but I've read too many of these not to know that's in your head) is NOT an option.
Finally, she will need to show the judge a valid reason why emancipation is in her best interest. The level of "abuse" you have described is not even close to enough to prove that point. Her step mother taking medication (EVEN IF for a mental illness) is also not even close to a valid reason why emancipation is in her best interest.
But, as indicated, the second two points will not even come up unless her parents (both of them) are willing to sign her emancipation petition.