Have you heard of that TV show, Big Brother? Well, it doesn't matter since Big Sister Live Sex only has the vaguest resemblance to it. It took me a bit of time to figure out what the hell the site's premise was. However, from what I can tell, the main part of the site is a house with cameras all over the place filming the hot chicks living in it at all times. They also tend to be naked a lot and have sex with guys (no, I am not sure how the guys get there, but they do).
Right on the homepage of BigSisterLiveSex, you'll find all the live cams. When I was there, most of the rooms were empty, one chick was sleeping and in two rooms there was some naughtiness happening. To be honest, this site is all about the voyeurism and shouldn't be joined if you're looking for good hardcore fucking. Yes, there was some sex happening when I was there, but there was also a lot of talking (in Czech since the site is based in Prague). With only two or three camera angles, the visuals aren't always the best, but the quality of the actual image is quite good. This site is all about watching and surfing through the rooms looking on the girls and the general goings on.
They do realize that sometimes there just isn't going to be anything exciting to watch on the live cams, so not only have they made past live cam stuff available in an archive, but they have also hundreds, if not thousands, of downloadable and streaming video clips as well as full-length DVD titles. The price tag of Big Sister Live Sex is a little high and nothing is being updated, but it's definitely a unique and always novel live cam experience. Moreover, with all the bonus content, you do have plenty to watch if the live cams aren't doing it for you at any particular moment.