Natalie and Britteni both have the quiver factor. Natalie is resting on the bed and Britteni comes in and explores her belly, bellybutton and even around her bikini line, making it jump and quiver, taking pleasure in it. Natalie wakes up and loves it, reacting and quivering. Then Natalie wants to try this on Britteni, the girls switch places and Natalie runs her fingers all over Britteni's belly. The girls talk about the quiver factor, torn between it feeling strange and totally enjoying it.