I couldn't find much information about this movie online which is a shame because it's actually pretty good. It's a small, self-contained film from the latter half of the Golden Age that does a few things right that I really appreciated.
The plot involves a woman being forced to spend a weekend with her boyfriend's 'debtors'. The boyfriend (who we never see) owes these guys and so they have demanded that they hand over his girlfriend from them to debauch as a consequence.
Rhonda Jo Petty (who naively performed under her real name, causing her problems in her personal life) does a great job of selling herself as an initially innocent, demure and unwilling player in their foursome plans, which adds to the excitement, especially because it takes a while before we really get to see her in action. This kind of building of anticipation is rare in adult films and really worked for me.
This is a mostly four person film until the end. We mostly see the same two men and women in each scene. We don't get to see new flesh in every sex scene. Instead, we get to see the sexual evolution of the same characters as the ante is upped over time. I really enjoyed this intimate dynamic; less variety but more humanity, which is what I really appreciate in 1970s adult films versus today.
Anyway, this is a great little film.