Well lots of checking with IAFD and looks like this clip may be Monique Demoan's greatest hit, in g/g anyway, which is all I'm interested in. But it is a great scene!
Hah, found it. This is Kaitlyn Ashley and Monique Demoan, not Lezley Zen, though Monique does look like Lezley. It is from 1996. Directed by Jim Enright for Metro. It is pretty good - hot and convincing performances, and I'm not one who usually likes strapons and toys in g/g scenes. Suddenly have a big interest in Monique Demoan...