Actually what I saw on the replay was Caitlin doing what she often does...on her patented 3 point shots, she jumps into the defender. On this instance it was Ashlynn who was hurrying to put her hand near Caitlin. When Caitlin landed, moving forward, she landed on Ashlynn's foot, and Caitlin rolled her ankle. It's a shame that a defensive player gets called for fouls when the MO of this player is to jump into her defender.
And when Clark is driving towards the rim, the majority of the time she uses her off ball forearm to push the opposition away. This too will be called a foul against the defense. But if it works, keep doing it.(Which she did...)