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You are on vacation at a remote holiday house with your step-sister, her boyfriend, your girlfriend and some mutual friends.. who have all gone upstairs to bed. It's just you and your geeky step-sister hanging out downstairs with not much to do and only your shared past to talk about. Your step-sister asks if you remember when you practiced kissing on each other when you were younger living at home.. you pretend like its a distant hazy memory, but in reality you think about it all the time. She asks if you wanted to do it again for old times sake.. you act like you don't want to but she doesn't leave you much choice anyway, crawling on top of you and kissing all over your face and mouth. Your dick grows harder as she leans against your crotch.. and then before you know it she's bending over showing off her panties and pulling her t-shirt up exposing her forbidden tits.. and thats when she gets in between your legs without even asking and just starts to suck your cock.. oh fuck you could cum instantly.. but you don't.. you wanna take it further but you don't know how to ask.. oh wait.. your step-sister is practically BEGGING you to push inside of her.. but just the tip because it won't be SO wrong then.. just the tip inside your tight step-sister will be almost impossible, right? You fuck her quietly as your girlfriend and everyone else is just upstairs and could come down at any second.. she then tells you to pull out and with her hand, she strokes you off all over her tits and face.. this night must NEVER be spoken of again.. a secret forever.