it was not supposed to be like this. Sakura had a relationship with her son Shota just to kill time. Temporary hesitation. That should have been it. However, the body remembered the pleasure given by Shota so that the dry sponge would absorb the water. I can't be satisfied with my husband's actions anymore. It must be sex with Shota ... Sakura realizes that she cannot go back and drowns in forbidden mother-child sexual intercourse.