Oh wow, she could have at least left a note or a sign that she was leaving to be happy and was safe (she didn't need to mention marrying an enemy). It's kinda harsh running away without a word when you have family that apparently cares about you that much.
Maybe they could negotiate peace with each other with their marriage? Then again, it's probably a century old feud so it'd be hard. Then again maybe the younger generation wouldn't be as opposed to new ideas but that's only applicable if they hadn't isolated themselves from the outside world.
Ah, nothing more exciting than watching a very classified intel from enemy territory with your wife who is from there and ALSO the leader's beloved grandaughter