Would You Deny This Person Internet As Well?

This is kind of a long story but I’ll give the nice short version If I can, Here it goes. A few weeks ago I let my Brother and his Fiance stay in my guest house providing they keep it clean and pay for the utilities they use and they could stay as long as they needed because their house was being renovated. It was going good for about two days and then my Brothers Fiance came over and asked if she could connect to my home network and my response was “If you connect to my network you’ll have to install an Antivirus program and my internet filter on my Router” and then she got all mad at me and said that the filtering software would block everything she does. I asked her what kind of stuff she did online and she wouldn’t tell me so I refused to let her have the network password and then she started yelling at me and said she would pay for what she used if she didn’t have to install the filter and I told her “the filter and antivirus is to keep viruses out of my network and anyone who wants to use my network must have it”. She didn’t like this answer and stormed off and tried to call the cops and have them make me share my network and when that failed they left in less than a day. My first thoughts were Oh my what kind of illegal stuff does this girl do online. In this situation would you have done the exact same thing? I’m just completely baffled that somebody would really do this especially since I let them stay in my guest house for virtually nothing.