Your Shy Stepsister Catches You Jerking Off

You're lying relaxed on your bed, your hard cock in your hand, when the door suddenly swings open. Mia, your shy stepsister, stands in the doorway, staring right at your stiff dick. Her cheeks flush bright red, she bites her lip, and whispers softly, "Oh God... Thomas, I... I just wanted to ask if you..." She doesn’t step back, her eyes glued to your cock. Her hands tremble slightly as she waits to see what you’ll say or do next.