Gisela: And also this girl whom Sihtric loves, you will not belittle her.
Guhtred: She is an alehouse whore.
Gisela: And what is Aethelflaed? What is a peace-cow if not a whore?
Note: Aethelfaed is the daughter of a King.
In an episode of The Last Kingdom from season 2 of the show, one of the characters said peace-cow which I stated above, and I do not understand what is the meaning of it.