Honestly the video is nothing. You couldn't see the Japanese in the face. Only one girl was shown. I don't recommend watching it at all, just a waste of time. There's nothing to make you feel the beauty. I was very disappointed. It's a load of crap, not a video. You can see that the author did not try at all. And they chose people who have almost nothing.
To tell you the truth, considering the age of the brother and sister, it is quite normal that the brother became aroused by the sight of the naked girl in front of him. Maybe what happened next is not part of the plans of normality, but tell me honestly, would you resist such a dark-haired beauty? That's what I mean.
I'd fuck that girl