If it doesn't say that the 4 weeks need to be paid than I don't think she has a case and I would allow them to finish off this week since they paid for it. Lesson learned and she needs to fix the wording in her contract.

I ask for a one week deposit to be used towards the last 4 paid weeks in care. A family could forfeit this and just leave I guess but I could also take them to small claims if I wanted.

If a parent thinks something bad is going on I can understand why they might forfeit the deposit and just leave though.