Her sister is so drunk that she thinks it’s her boyfriend who is fucking her
He arrives from the party and since several days have passed since he started drinking, he doesn’t know if it is day or night, he doesn’t know which house he is in and he didn’t even go to bed. So she thinks she is in her male’s house where surely she has no problems with having her clothes taken away and everything else. Only it’s her brother who wants to, he starts touching her pussy and then puts his cock in her mouth. She has no idea who is fucking her, all she knows is that she has a cock in her pussy and she likes it. Or at least that’s what she makes it seem with the moans she produces while being nailed.