hahaha.... just tell your g/f your just doing some research so you can satify her more. lol =) Umm... I know you can clear the cache and history with Netscape and it doesn't really leave a trace on the computer. How professional is your g/f? Like is she going to really go searching for these files?
Or maybe if your g/f questions you say "It's your fault for not giving me enough action" he|| it's worth a try.
Take it easy, and keep it clean.
§am.