There are those who say that for the French anal sex is sacred. And this French mother has never had a cock inside her anus, because her husband preferred her pussy. So now that she's a widow and still curious, she asks her son to stick it up her ass.
The mature woman is cleaning the house when she sees her son taking a shower and she gets so horny that she starts giving him a blowjob to prepare the ground. Then the boy blows her pussy and ass in equal parts so that his slutty mother enjoys what it's like to have a good cock up her ass.