My step-sister, who suddenly appeared after my parents remarried, doesn't see me as a man, or maybe because I went to a slutty all-girls school, but at home she's always showing off her panties and breasts, which is too stimulating for a virgin like me, and I get a boner every day! Of course she finds out, but I thought she'd just tease me without caring... but it seems she was just holding back and reaching for my dick! So I didn't hesitate to swing my hips around! I came inside her like crazy! I don't even remember how many times we did it!