Well apparently the girl likes to ride on a big dick of her lover, see how she goes along, and even then to a greater extent he fucks her, not she on it, although what difference does it make, because the change of places do not change the sum, especially in such a delicate matter. They obviously fucked in the glory, and both received an unreal pleasure, it seems to me, and I think the repetition is not far off.
But she shouldn't have slept naked, then her brother wouldn't have taken pictures of her fur. And now she has to suck his dick so he doesn't post these pictures online. It's a big brother's favorite pastime to get sisters like that to have sex. She doesn't know that he didn't have a smartphone in his hand and he was just jerking off on her. So he gave the girl a free pass. I'd probably do her ass so she wouldn't be so stubborn!