chapter 11 is confusing can someone explain it

Waiting the explanation

(Historical drama)
A cheerful woman, her husband was at war, came back with a disability and beat her out of frustration. The attendant saw that she was no longer the woman that he loved, so wen she asked him to kill her, out of sympathy, he granted her wish. And now her happy free soul hunts the manor.

Actually he killed no one it's the wife who killed her husband he only buried the few days old corpse.