Eavesdrop on the twins.
From Create Your Own Story
You stand outside of their room and place your ear to their door. You definitely heard skin slapping against each other and moaning. Curious, you grab the doorknob and slowly turn it. You open the door the slightest inch, just barely allowing you to see into their room.
But what little you see is far more than enough. Jake was sitting at his desk facing the doorway, but his view was obstructed by a completely naked Jessica bouncing on top of his cock.
You didn't even realize that you were witnessing your brother and sister having sex--all you saw was the ass of a hot woman shaking up and down on a hard cock. Instinctively, you put your hand on your cock.
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