WirelessBrain :
But if she turns off the router in her room then that router is not connected I presume, so would it be like I have just taken that router and set it up in my room. Can any other friends on here give any other ways around this problem please, I would be much appreciated.
There are four parts to connecting to the internet
ISP
Modem
Router
Devices (PC, Xbox, etc)
The middle two may well be in the same case. Modem+router.
The ISP will talk to one and only one modem per account.
The modem talks to one and only one router.
The router can and does talk to many devices.
To connect to the ISP, you have to tell them the MAC address of the modem. They put this in their list of allowed devices.
You can't just randomly connect another modem+router box and expect it to work.
Solutions:
1. Get and pay for a whole other connection from the ISP
2. Convince Auntie not to turn it off at night.
3. Move out and get your own apt/job/internet connection