It's your weekly game night with your little sister but she has something other than your usual board games planned this time... She wants to see how can cum more in 10 minutes, you or her. She's got a sneaky little look on her face and she's teasing you, shaking her ass in her panties, you can't resist you're in, lets play the game...

In this scene, your sister has invited over her hot step-brother to play a game of truth or dare. She quickly gets him in the mood by demonstrating her prowess at masturbation, and the excitement quickly builds as the countdown starts. As the timer runs down to zero, your sister reveals her dirty secret: she wants to see how many shots of cum she can pop in ten minutes. She starts to masturbate harder and faster, and soon the room is filled with the sound of her orgasm. As your step-sister cums, she barely has time to catch her breath before she starts the countdown all over again. This game of truth or dare quickly turns into a competition to see who can cum the most in ten minutes. And as the minutes tick away, your step-sister becomes more and more aroused, until she finally cums again with one final blast of cum.