The sisters are those pussies, which you try to satisfy, see how he fucked them, and they do not give a damn, go around smiling. I think that all was filmed very cool, it is clear that the picture worked hard, and the main character perfectly grilled these young chicks, who apparently have not had sex for a long time, as they give him a good hand, the cock came to their liking, moaning like wild.
Apparently the husband had his wife so worked up that she was ready to put any hole in her body just to have a rest, so he found a neighbor, whom he periodically fucks in her presence. At the same time she is completely uninhibited, and gives in the ass, and in all the slits that he asks, because his large cock she likes thoroughly, judging by her moans, even more than thoroughly.
It seems to me that the housekeeper was deliberately misbehaving on purpose, seeing who the owner of the house was. Look at the way she looks when the nigger unzips his fly!