Ah, most women let go of their anxiety about childbearing after the age of 30 and become more in tune with their own feelings. By around 40, both body and mind are more relaxed, and their sexual desire tends to become steadier and stronger. Judging from her daughter's age, Azuma Mom must be at least 38 or older. She's at exactly that age when her “Sit on the ground and suck the soil into her pussy”.
I can't even imagine how primal and intense sex with Azuma Mom would be. I've tried my best to recreate the soft, full lower belly of a woman who has given birth before. I really want to rub against it. Maybe next time!