This short clip has been turning up inside of other rar files... that's to say when you're downloading something and then uncompress it, something extra (another file or two) is also inside. Usually it's just some random clip (wasting your time and bandwidth) but once in a while it turns out to be something good, as in this case.
It looks like some amateur clip (just 2M in size) though I suspect she's perhaps a known gal and the clip is staged. Her BF pesters her for sex and even though she's in a rush, she gives in, scoops a pair wonderfully heavy-looking soft melons from her top, and (presumably) gives him a handjob. As you can see from the index file, this particular copy of the clip freezes just a quarter of the way in, but if anyone recognizes her, I'd certainly appreciate the info.
Z - 02.flv aka med pend bru handjob SOLVED! It's Taylor St. Claire!
Added later: FYI, this clip in a more complete form has been making the rounds lately under the name "Unknown Cute Sexy Big Boobie Girlfriend – Gives Handjob" in case anyone's interested.