Tsubaki lives with her husband and son. - Even after 30 years of marriage, she continues to spend the night with her beloved husband. - However, recently, my husband has become weaker and I can't come to orgasm easily, so I cheat every day by saying, ``I'm done.'' - Tsubaki masturbated by herself every time, hiding from her husband. - One day, my son came home covered in mud. - Tsubaki tries to take care of her son who has fallen asleep at the entrance. - Before I knew it, my hand reached out to the growing bulge in my son's pants, and I ended up straddling him...