you're watching your big sister in her room looking at herself in the mirror. she is in some slutty new lingerie outfit bragging about how good she looks and how anyone would fuck her. then she sees you peaking in on her, she doesn't mind much since she loves to show off her body (to anyone). she asks you to come into her room so she can model her body to you. she starts to poke fun at you, that you're such a nerd, goody goody, how you've never seen a girl naked and still a virgin. Then she offers to show her tits, then her pussy. "it would be so fun and dirty if we went into mom and dads room" then she seduces you more with her half naked body and starts to suck your cock. "how have you been able to contain this ?!" Then she begs you to fuck her "we don't need a condom - we're siblings" she wants you to cum inside of her. "you're not some innocent litt .le boy after all"