It's actually a little hard to tell the exact nationality of the performers here. (The Netherlands, maybe? Let's just say European.) Anyhow, this is not your usual smut tape. What's going on here is just, well, it's a little weird. Incidentally, there are four scenes, two b/g, one g/g and one threesome with one girl and two guys.
This reviewer isn't going to even attempt decoding the cryptic, threadbare "plot." Let's just say, though, that some sort of vacuum-pump is being used on the women's vulvas, making them disturbingly swollen, hence the title. Some girls are bigger than others. (Seriously, these women must not be able to close their legs in this condition, what with their vaginal areas being the size of a grapefruit.) By the way, there's only anal sex happening in these scenes. Presumably, it's tough to slip a penis past those overly enlarged, fleshy folds.
The third scene shows two lusty women, one blonde (with a completely bare vagina), and one raven-haired (wildly unshaven). The blonde dons a strap-on and takes her friend from behind. This scene ends with the blonde sucking the strap-on while her friend licks her pussy.