What does "unsupervised weekends" mean?

Where we are, unsupervised weekends means full days with the bios but not overnights. It would be like from 9AM to 6PM both Sat and Sun..so the kiddos would just come back for the night schedule. If they stay overnight with the bios, we usually just call those "Overnight Weekend Visits"...meaning they can take them any time Friday evening or Saturday morning until Sunday night. Its seems the verbiage is different depending on where you are. I would just make sure you have full clarification from the SW. I'm happy to hear the biomom is busting her butt. I wish more were like that so these kiddos wouldn't be stuck in care so long.