If I found out my sister was a slut, I would have pulled her in the asshole, too. For these guys, getting their asses handed to them is commonplace. Although for the look, they break for a few minutes, but when a couple of drops of lube appear - they quickly sit down anally on the phallus. So this little sister is nice to feel like a courtesan, to show off all her skills in front of her brother, to let him cum in her ass. Every bitch dreams of being the best at it.
It's a curious topic, especially against the backdrop of molestation scandals at work. They yell a lot, but the video, where the brunette supervisor gets into the underpants of a subordinate, immediately receives a mountain of likes and approving comments. Which is absolutely correct: nature takes its course, and it does not matter where, at home or at work, two adults have sex at their mutual desire.