I also have doubts about Janet Jacme as "Mystery". Janet's facial expressions are quite different.
Sarah Young: Private Fantasies 21(scene 2) is streaming at several sites. I was able to find quite a few streaming copies of Toi Clayton films, and certainly see a strong resemblance to "Mystery". However, I have not been able to find any reliable links between Toi Clayton and PF 21.
Some links:
http://www.boobpedia.com/boobs/Toi_Clayton
Two iafd listings:
http://www.iafd.com/person.rme/perfi...nder=f/toy.htm
http://www.iafd.com/person.rme/perfi...nder=f/toi.htm
Other opinions?