My Tiny Stepsister is Huge Squirter

You find your stepsister's phone lying around so you take a look what she has on it and guess what you find.... pictures and videos of her masturbating! She comes over and wants her phone back but you, such a pervert that you are, want her to do striptease for you for the phone. She has no other options really so she does as you want or else you are going to tell. One thing you did not know about her was that when she fingers herself, she squirts like a fountain!! Few days later she gets caught doing a live show and you want even more now.