I've seen the
Sacred Sin DVD starring Heather Vuur (Vandeven).
Heather looks great in the movie, that's good. That fact that it's one of the most over produced, tedious sex movies ever is bad. Heather's only scene is a three way lesbian scene where she does get digitally penetrated in fairly pedestrian fashion... but it is interesting to see any model as hot as Heather perform her first hardcore action.
There is a bonus DVD with Sacred Sin and it has a mostly solo scene with Heather masturbating slightly more explicitly than her scene in the movie... think of the hottest Penthouse DVD with extensive fingering and you'll get the idea.
Bottom line is Heather looks good but seems a little tentative with her first "hard" modelling... still exciting if you're a fan.