Everything is clear - he tricked her into sex, but who really filmed it? He obviously filmed it with a different camera than the one he had in his hands! A hidden camera does not give this angle and quality of shooting! So the cameraman in the room with a professional camera and a camera in his hands just a farce.
Wow, what a sexy sister. It didn't work out for her to just take an empty shower. The boy decided to go for it and took his sister for a ride.