BRD-010 Mother-son play game: Defiled mother, Rui Ayukawa

After her husband passed away, Rui was left in charge of the factory. There, employees with their desires exposed! The lewd acts of the employees unfold in the factory! For her husband, for her son... Rui confesses everything to her son, who sees her defiled body in front of her. What is the answer that the father and son come up with in the moonlit room...?