In the animation controller, on the animation clip, try checking the Foot IK box and see if that fixes it.
Viewing post in Unity Sex Animation Pack comments
60-70% I would say. In RoughDoggy, the girl looks great (though the animation itself is still weird) but the guy jerks back and forth.
In addition to the FBX model, perhaps you should record a video of what it should look like in "reference quality"? I really don't understand the problem with the animation or my model.