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.
Ta in place of a guy would be a sin to be confused and not to take advantage of the official position, especially since the ass of his girlfriend was on fire...