A family reunion has brought you and your quirky Sister together to stay at your Cousins house for the night. Upon arriving, you both head straight upstairs to get away from everybody, where you discover there is only one bed for the two of you to share. Your both say your cool with it and decide to spend the evening hanging out in the bedroom away from your annoying relatives. Your Sister lounges on the bed writing in her diary in nothing but a tee and panties.. its more than a little distracting but you try not to stare. When its time for bed, she asks if you can keep the light on and the two of you talk about old times.. when life was easier before your parents split..when you were closer.. she wonders if you've forgotten the time when you both practised kissing and you touched her a bit before you went away to live with Dad. You definitely remember.. you often can't think of anything else. She moves closer and you think she might kiss you but she tells you its time for bed and turns over. You can't rest knowing her ass is pressed right up against your crotch and start to rub your cock against her ass cheeks, spooning her, wondering if she'll wake up and if she does.. will she resist? ..your Sister starts to grind herself against you in her half asleeep state and reaches around to take hold of your erection. She takes off her shirt revealing a pretty pink bra and takes you in her mouth. She begs you to fuck her pussy but you gotta be quiet.. your family are still chatting away oblivious downstairs. You both can't quite believe whats happening.. its all happening so fast.. your unprotected cock is balls deep inside your Sister, her legs pushed all the way back. She then climbs on top, fucking you, taking you all the way inside her bare, tight pussy.. she asks if you'll cum inside of her.. you don't know if you can.. its too dangerous, you don't wanna get her pregnant.. but then your Sister DARES you to cum inside of her.. and being her Brother, you KNOW you can't back out of a dare!...