“I’m sorry for suddenly showing you such an embarrassing situation….And even more so, having sex with my son and feeling what he was feeling….I’m a failure to be a mother…no…I’m a failure to be a human being….I’m sorry for letting this happen. , I'm also the cause of this...'' Rie has decided to live with her son and his wife as the third anniversary of her husband's death has passed. With her son and his wife, both of whom work together, Rie does the housework for her,