NTR-obsessed mother: The plain and quiet mother's true face is a pure-looking bitch who gets creampied while her family is away and cums all over

Yosuke suddenly cancels his overseas trip with a friend due to bad weather when he travels to the destination, and returns home late. Dejected, she opened the front door and heard a conversation between a man and a woman who could not get along with anyone from her home, where only her mother was supposed to be. "...Wife." "Your cock was big and lovely... I wonder if I'll personally ask you to deliver a big cock again." So Yosuke saw a mother seducing a young man who was a delivery man. Shocked by the lewd appearance of a woman he had never seen or heard before, Yosuke was unable to make a sound, and he stood there and witnessed the whole story...