My mom thinks I go to o sites. Even though I don't...anymore?

I am now 12 3/4. When I was younger, I'd go on tons of sites just to look/get horny/satisfy my curiousity. I stopped because we kept on getting viruses. We got a BRAND NEW computer. My mom AND dad both knew I used to go to sites. I told them I won't again. And I told the truth. I never went on a site the day we got our new computer. Now, we keep on getting e-mails from SUPPOSEDLY recent sites that were visited and they were o websites. I never went to a site with this new computer, and once my dad even hit me because I went on one when when I was little. So, who keeps on going to sites now? I live with my mom and dad. My mom doesn't even KNOW how to use the computer and my dad is a computer expert. After he got off the Internet one day, I checked the history out of curiousity only to find a bunch of 'xxx' sites. My dad keeps on telling my mom that I went to those sites and I keep getting punished for something I didn't do. My dad keeps doing this (CONT'D)