"Keep Going Step Bro"

Your step-sister is sitting on the stairs waiting for her friend to pick her up, but she's taking ages. You can see right down her top to her tiny breasts and erect nipple, and it's turning you on. She can see your hard cock through your trousers and can tell you want to stroke it. If you give her a lift into town and pay for her night out, she'll allow you to wank your cock while she teases you with her tiny titties!