It's a scene were she's fucked in a bar by "her best friend's daddy"! Couldn't find the source, but I'm pretty sure it's from one of the "Briana Banks aka Filthy Whore" videos. Here's a link to the scene & some pics too! She looks hotter than (perhaps) ever here!
You are correct. In fact, it's scene 1 on the very first Briana Banks AKA Filthy Whore, which is an edited version of scene 5 from American Nymphette #2.