My question involves business law in the state of: Florida

This question is for my wife. She has been doing an internship for a very big company for the past two summers. They gave her a verbal agreement for her to work there when she finished school. She has been receiving emails for the past two years stating they can't wait for her to start, invites to all of the company functions, and asking her give them a date for when she will start. By her thinking she would have a job, she told them when she finishes Grad school and they said ok. The other day she gave them a date and they told her they would call her back. They called her back yesterday and said that they are not going to hire her because they weren't hiring any more. She told them how she has turned down many job opportunities with competitors of the company because of their verbal contract. Also she knows someone in the company and they told her they were still hiring people and that the reason (rumor) they are not going to hire her is because she has a baby and they don't think she will work the long hours. My question is, is this legal?