From the front as well as from behind - well, absolutely flat woman. Only one advantage is obvious - well-designed orifices. And of course due to the flat buttocks it's very convenient to pull your partner in the anus, even without bending her over. And I don't see anything else interesting in this lady! The man is basically of age, so probably the determining parameter for him is the age of the woman and the possibility to work her anally!
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.
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