Viking virtues like staying true to your word, even if that means death. A deviation of this is the stoning of men that tried to flee from combat - by their wives.

Viking society was very gender based with clear roles for man and woman, and while being a bottom would hurt your manly rep, being the active partner in a homosexual relation would bolster it.

Children still had top prio, so without a wife being too didn’t make the cut.

I'd have let her do it, not that I'd have a choice, but I'd rather be willing, conscious, and proven a fool than unconscious and left only with the smell of her victory.