Incest: The targeted mother

Yuka married her now husband two years ago. Recently, my husband has been on many business trips and is often not at home. As a result, he spent more time with his husband's stepchild Atsushi, and became friends with his step son. One day, Yuka finds a video camera in Atsushi's room that he said he had purchased with part-time job wages. When I looked at the footage that was filmed in no time, I saw Yuka being shown there...