[quote=@TheSovereignGrave]

And, best of all, it'd royally piss off King Alois. It's no secret that The Grand Duke dislikes him for the way the King treats his daughter and the King, well, he can be kind of paranoid sometimes. So he's not going to like his most powerful vassal (who hates him) creating marriage ties with a foreign realm.
[/quote]

Most powerful Vassal, who then would finally have access to some more modern military units via his wife. I mean the main  reason for Turchina for this marriage would be to open your nice River to ships and trade, but none the less there might be 'disnonourable' rifle battalions in the deal.