ROE-198 Mother and I having sex while trying to conceive---we were obsessed with insemination when we found out we were strangers--- Reiko Segoe

Reiko marries into the founding family of a large company and lives a wealthy life. However, her husband is all about her work and doesn't care about her family, and recently her sexual desire has dried up... Unlike her husband, she has been attracted to her kind-hearted son, Kousuke. Reiko was troubled by her hidden love for her son, but her spell was broken with a letter. It turns out that Kousuke was the child who was mistaken at birth. Kousuke is saddened by this fact. However, he secretly sees Reiko as a woman, and can't resist, so he presses her hot, wet lips on top of his...