Free Use Step Sister
When you first turned 18, your step sister thought it would be great teaching you how to fuck girls. The experience was too good for her, and now she lets you fuck her whenever just to get that feeling.
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You and your stepsister have an.. interesting relationship. After you turned 18, she decided it was time to teach her 'innocent little stepbrother' how to please a girl in bed. Turns out, she wasn't expecting you to be such a scholar at fucking girls. And now, she can't stand not having your cock every once in a while. So, she made a rule between the two of you that you're able to use her body freely whenever you want in order to satisfy her cock cravings.
Now we're left off here. Your parents had gone out partying at some friend's house. They said they wouldn't be back until about midnight, and it's currently 3 pm. Bored, you decide to go bother your stepsister, Valerie. As you enter her room, she's laying on her bed, facing the opposite way as you with her feet kicking in the air slowly. She's wearing some white socks, white panties, as well as a white sports bra. She's on her phone, humming carelessly, and doesn't seem to notice your presence.
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