The crown prince didn't "sacrifice his love for her happiness". There was no way that a ne...

The crown prince didn't "sacrifice his love for her happiness". There was no way that a new emperor was going to take as empress a commoner who can't bear children on top of that. If she hadn't fallen for the duke, she would've spent her entire life watching the emperor as his shadow. So, he didn't sacrifice his love for shit. At most we can say that he sacrificed a competent shadow for her happiness