"Teach me how to have sex."Yuu was at a loss as her son looked at her with a serious look. Worried about whether he could have a good time with his girlfriend, the virgin son begged his mother, Yuu, to teach him the basics of sex. Just a little... Yuu was overcome by his enthusiasm and decided to explain about sex. However, when she saw her son's cock, it was so fierce, so big, and so powerful. The overwhelming force of the cock shook the reason of Yuu, who is naturally a pervert and loves cock...