"Step Sister Temptress"

You and your step sister are home alone tonight and you're feeling rather horny. You go and see what Amber is up to, but she's just chilling on the sofa and playing on her phone. Your step sister isn't aware that her nipple if on show, and seeing as you're feeling quite horny, this really isn't helping. Amber soon realizes she's accidentally got you hard with her perky little nipple, but she's up for a bit of fun if you are ?