ttmouth Ok, it is the fall off setting (set to 99) that is causing the issue in your case. I believe those are settings created for a viewing experience called 'ghosting'. But i could be wrong.
Try these settings out, starting from the first cowgirl scene and see if you like the results.
42
11
65
101
998
Remember these are some very quick settings and I did notice some issue regarding the eyes becoming transparent during the BJ scene.
So I recommend that you try out those settings and tweek them till you have a satisfactory results. However in a scene like that with many contrasting and similar colours, it is in my experince difficult to achieve a perfect result since there always will be clutter in scene.
Edit: Didn't see Vrsumo's post, but definitely also try his settings out.