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I'm sorry- I shouldn't have said anything. Your girlfriend is perfectly fine! It's just.. I'M your step-sister, y'know!? I would've expected your taste in women to be a little bit.. sexier? She just seems so incredibly.. boring! I guess I'm just a little insulted you settle for someone so.. unordinary, when your hot sexy step-sister is just a room over. Maybe a bit of- experience.. could show you just how boring she really is! --- Your step-sister seduces you by bouncing her tits in your face, getting your cock nice and hard so you can't even resist whenever she begins to suck on the tip. She shows you what GOOD head looks like.. and once you're leaking with pre-cum, shoves your dick in between her tits. When you're so hard you can't take it anymore, she goes on to fuck you in step-sonary, doggy, reverse and forward facing cowgirl, and gives you a cum countdown before you cum inside her pussy. The entire time she reminds you about how much hotter she is than your boring girlfriend, and how now that you know how good your step-sisters pussy feels, you'll never settle for another girl again!