Maybe this was a dream or I’m mixing stories

Didn’t somewhere at the start it was mentioned that the person Blake originally wanted to marry was Diana but their father didn’t want to give her away so he ‘sacrificed’ his Ancia. Tho maybe the whole ‘wanting to marry Diana’ was in the original world/story after they grew up. I’m just tryna find a way to justify why she’s so hell bent on denying Blake’s feelings