I foresee problems. Florentia's goal is to lead Lombardi. The second prince's goal is to do anything to help Florentia, so it follows that he will overtake the first prince.
Realistically the head of Lombardi cannot be married to the Emperor. The rest of the influential families in the kingdom won't stand for the obvious favoritism, never mind the issues that future children would have to deal with.
Realistically the head of Lombardi cannot be married to the Emperor. The rest of the influential families in the kingdom won't stand for the obvious favoritism, never mind the issues that future children would have to deal with.