I would say that you friends laptop has a wireless adapter built into the machine and you neighbour has a wireless router that is not encrypted ( locked ). So if she clicks on the internet she connects straight away. This would require no internet povider on her laptop. The internet provider would be your neighbours.
You on the otherhand will probably have your hub encypted so no roving laptops could connect with out a pass key.
It would be well to inform your neighbour to secure the network so no one could steal or gain access to the network.