As Pink Fox applies oil to her muscular calves, she keeps one foot on the floor. There is lots of muscular tension on that foot and ankle, as you shall see here. Towards the end of the clip, you can see that shredded calf muscle fasciculating.

Go here to see the biceps of Lilly: https://www.clips4sale.com/studio/16540/pink-ivory

See Mitzi here: https://www.clips4sale.com/studio/11626/mitzi-s-sexy-legs