For all three sex was a test of strength, and I can say that both the blonde and the brunette were worthy of the test, showing the guy his ability to please. Impressed by the restlessness of the guy, who worked all the holes, not paying attention to the cries of whores. The brunette pose with his legs upwards impressed most of all - with such ease and agility the guy's ass bounces, and the cock knows its purpose.
It's something new to just fuck in front of your parents like that, especially with your sister. She's very pretty, though, and that served as a good reason to pull her on for a long time.