Unserious things aside, I'll address the things.
Just tell her whats going on?
She knows, she doesn't want it changed. :/
I know WEP is unsafe, WPA's my main man
also disable your guest network from your router op
I have a network named [wifiname]-2, but it's secured. I'll assume that isn't a guest PW.
Also, I'll try MAC filtering when I get home. And I don't have throttling, it's not a 4G dataplan.