Responses
Emilia was his aunt, so her child would be his first cousin. Habsburg, away! ε=ε=(ノ≧∇≦)ノ
Incest was a common thing within royalty, so it's pretty accurate ╮(￣▽￣)╭
It wasn't at first sight but yeah he "fell" hard
Wouldn't Emilia and the prince be... Related? By blood? And it looked like the prince fell hard at the first sight of her