Mommy is a bit of a country chick in this one. They believe in some weird things in the back country. Mom wants to carry on the family tradition of breeding with, well, family. So after a long day with the horses she comes in for relief from her son. He always says he wants a little brother so mommy decides to have him impregnate her. She has a her sweet boy nut deep in her pussy and then holds her legs up and thanks him for helping her carry on the genes.