Acting as a Good Wife to Her Ex-Husband in a Period Novel

Newcomer report, everyone is welcome to read my work, I hope you all like it... A "scumbag recycler" who travels through the ages performed an extreme act of "praising and killing" a good wife on the husband of an army officer in the 1970s. However, when the mission was about to be completed, she discovered that the "true loyal dog" she was ordered to save was the "tool man" neighbor she had been using to irritate the scumbag.