Behind the Mask

Young female Melissa Moore starts to get unidentified calls from a mystery person, who only breathes into the receiver. At the start, she is unnerved by the calls but, as they persist, she concludes that it's likely just her boyfriend pulling a prank on her. Thus, she begins to engage with the 'mystery caller,' joining in the game, and threatening to uncover him for being a lewd individual.
implying she's aware of his identity! However, no matter how much she provokes him, he remains silent and unresponsive.
She starts to look forward to his calls and daydream about their make-believe sessions. even pleasuring herself to the thought of it. Eventually, when her parents have retired for the night, she dares him to reveal himself. If he can stealthily enter her house and face her then he can do as he pleases.
even have sex with her.
When the 'mystery caller' abruptly ends the call, the girl assumes her boyfriend's trick is done. When he quietly infiltrates the house and finds her in her bedroom, she is surprised that he actually showed up (wearing a mask no less) and she willingly surrenders to him, reveling in the thrill and continuing with the roleplay. In a very raw sexual encounter, he takes her from behind and has sex with her against the wall, on the stairs, more intensely than they have ever done before, and right under her parents' noses! After a powerful climax, the masked mystery man departs as suddenly as he appeared.
The worn-out teen can't fathom how potent it was, as she reclines in her dimly lit room. Her phone rings. It's her boyfriend.
'I can't believe you,' she exclaims. 'That was so steamy! How did you think of that?'.