Train her sisters' pussies to be good whores

Her sisters are worried that they are going to college soon and they know that everyone there has a lot of sexual experience and that they are going to fuck a lot, but they are useless in that sense. So the two of them, very fearful because they don't know what to do, end up asking their older brother for help to fuck them. One of them is the most emboldened and ready for cock, while the other ends up joining as well. He tails both of them and starts them so that they can undoubtedly behave like good whores when they get to college and start putting cocks in front of their faces.