Responses
Imperial families need the support of dukedoms to inherit the throne, oh heroines family is an important duke and if married to her the second prince gets support. Or so I think. That’s why they needed the engagement.
or I missed the explanation, if prince creep and Lady bitch are so in love, why aren't they getting married? She's a marquess' daughter that's not so unlike a Duke so it's not like she's got no backing family-wise. Why the whole pantomime of being engaged to Eve, and if he needed her family wouldn't they kill her off *after* the marriage?