Mom will not teach bad things - so son and daughter follow all her advice. The daughter enjoyed spreading her legs and taking her brother's cock and the experienced mother's tongue between them. It seems that the young people enjoyed the class and are ready to continue this educational course of sex with their mother.
Every daughter has to learn how to have sex. And it's good when parents are understanding about it. Her father tried to teach her the easy way, but her mother said she knew better how to suck and wiggle. They decided not to touch her ass yet, but they taught her good manners in the pussy and the mouth. The mother turned out to be a skilful master and taught her daughter the right technique. What a wonderful family!