Find some way to get the daughter out of the house a couple times a week. 17 year-olds don't care about anything but themselves. Get her preoccupied and you'll no longer have a problem.
Also, It's her dad's house, not hers. He can do whatever he damn well pleases.
I have a Motorola SURFboard and a Linksys Wireless Access Point. I set up the network on my Linksys, but when I connect the SURFboard to the WAP via ethernet, nothing works. What am I doing wrong?