Making the Team/Mary, sucking cock
You walk into the room to find your sister sucking a third cock, while vigorously pumping a cock in either of her hands. Apparently the boys are all eager for their turns, just as you are, and thus have began to instruct Mary in the proper use of her hands. The scene is just so erotic, this 9 year old girl with drops of cum on her face and goblets of spit and semen on her chin, a thick dick fucking her face, teenager manmeat all around her. And she just sat there going along with it like a proper little... You are hesitant to call her that, even in your head, but she acts like a whore. And you hate yourself for it, but it is the most erotic thing you have ever seen.
Unashamed of the act you open your pants and step out of them and no one comments on it, not even Mary, but she can't as her mouth is full at the moment. This boy is as well using her curly hair as handles to hold onto and move her head along as he likes, gagging and gargling sounds escaping from your sister's mouth. The boy has not yet tried to bury his full length in her and you imagine she would choke on it for sure, but the mental image of her being forced to chuck down the cum directly fired into her throat has something going for it for sure.
All around you cocks are beaten, jokes are told, rough laughter fills the room and smartphones are used to make videos. You are sure it will be quite a while before Mary get's out of here, surely not before everyone had their fill. So, what will you do? Be the next to use her or stand in line like everyone else?