HUNTB-697 - High-and-mighty stepsister moaning on the phone with her boyfriend gets broken in from behind

My stepsister, who usually looks down on me, is busy flirting on the phone with her boyfriend. Fed up, I sneak up behind her and start pounding away. She tries to keep quiet to avoid getting caught, but her body betrays her. Despite her anger, she's soaking wet and struggling to suppress her moans. Let's see how long she can keep up the act before she completely breaks.