You get woken up in the night

You get shaken awake by your sister in the middle of the night. You rub your eyes and look around, seeing only darkness and the outline of your sister. "What the fuck, sis?" you ask.

"I couldn't sleep, little brother, I just kept thinking," she says.

You are about to reply when she moves closer to you. Before you can move she says, "Shhh, don't move," and you freeze.

"You know I always wanted a little sister," she begins as you feel your mind go hazy. "I wanted one who would do whatever her big sister said." Which made sense, that was what all good little sisters did. "One with an amazing body, and a nice big set of tits, like yours." She said, which was so nice of her, you had always been proud of your tits. "And more than anything else, I wanted my little sister to be my cumslut." She finishes speaking and looks down at you, stroking your braided hair.

"One like me?" You say in a soft feminine voice.

"Yes, one just like you," she says, smiling.