‌

Custom script Title and description amended to 'step' to comply with the TOS. You're about to start college in the fall, and decide to spend the summer with your older Step-sister, she lives close by to the campus. When you arrive, she is so excited to see you, bouncing towards you, hugging you. You feel her large tits pushing against you, watching them jiggle as she moves, turning you on. After sitting down and chatting, she shows you to your room, and tells you she's going in the shower, and you see your opportunity. You sneak into your Step-sister's room, she's in the shower, you grab some panties out of her draw to use for later, and then crawl in a space to watch her showering and getting dressed. She's too much of a tease, bending over in her short dress, bra pushing up her tits, the way she looks at you, the way she touches your arm. You jerk off in your room with her panties, calling her name, calling your Step-sister upstairs to watch. She's shocked, disgusted you want to jerk off in front of her, using her panties, asking her to touch your cock, it's taboo, it's wrong, it's perverse. You tell her it's no big deal, you're only Step-brother and Step-sister, but she looks at you, her dark secret about to come out, everything she has tried to keep from you for all these years, all her desires, the secret as to who she really is... all about to come out.