I think the husband knows that his wife is filming regularly. Look at that - she has a microphone on her left shoulder and is connected to her phone. He's probably jerking off at home when he hears his Asian wife negotiating with the next guy on the stick. To get those breasts moistened with cum - I'd get in line, too! Look how her buns have risen on those jerks - there's a lot to take in!
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.
Girls, who wants to have sex in the ass?)