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!
It's not even quite clear whether the brother helped his sister, pleasured her, or taught her. Either way, she should be grateful to him after a fuck like that. It's funny to see how he uses both his phallus and her toys to develop his sister's anal hole. It's bright and exciting, and you can see the details that are so valuable in a process like this. I wonder what he will turn her on with next time.
The lady is certainly not of the first youth, but very experienced and in very good shape. Unless she's lazy, just lie down or crawl and that's it! And to work on her own dick, you can't even see it! But on the whole, I think it's still nice to fuck a mommy like this.