Here's what Nikolai & Milena says in the chapter on Danilo:
'....it required little effort from Danilo personally [to find a bride] as his father and eldest sister, Grand Duchess Militza, set about placing a suitable bride in his path via the salons of St Petersburg.'
Nikolai was impressed with her lineage, her connections to the British royal family and the good position within the German federation (it having sided with Prussia in the war with Austria). Also M-Strelitz had a 'strong Slavic connection' due to settling of Slavic tribes settling there in the Middle Ages.
Militza brought the couple together by 'inviting Danilo for a personal visit to St Petersburg' where he met Jutta at the residence of GDss Maria Pavlovna (Miechen). 'Danilo may very well have been won over by the attractive nineteen year-old, but that can only be surmised. In any event his family rushed him to the altar, almost as if they were afraid that he might change his mind. The engagement was announced almost immediately and the wedding date set for July 1899.' The couple left for M-Strelitz soon after the engagement was announced and were greeted with much pomp and ceremony. 'In Cetinje, where Danilo's younger brother Mirko read Tsar Nikolai II's congratulatory telegram to cheering crowds, the response was equally enthusiastic.'
NII sent GD Konstantin K as his representative but Militza & Stana were absent due to mourning for GD George Alexandrovitch. Jutta arrived and disembarked from her yacht wearing Montenegrin dress and proceeded on to the church for her rite of conversion and took the name Militza-Jutta.
After the wedding, the 'future seemed bright' as the couple settled into married life and Nikolai & Milena eagerly awaited grandchildren. 'Danilo was a responsible man but his solitary and taciturn nature seems to have stifled the spirits of his young wife. Observers concurred that the Crown Prince's personal life was well organised, pleasant, even elegant, but also that it was a rather listless existence. The couple's life centered on their residence Topolica...It was a rather opulent court, more in the European style than...Cetinje, and Danilo was a worthy master, being a stickler for order and etiquette....Guests were rarely invited...as Danilo preferred to live alone in the world of leisure and repose he had created for himself, but Militza-Jutta was not so happy with this secluded lifestyle....'
As a final disappointment, the marriage was childless though Nikolai & Milena had 'apart from their natural expectations...[a] great affection for Militza-Jutta. Over time Danilo and Militza-Jutta's marital relations seem to have cooled, perhaps even to the point where she contemplated leaving him during the early years of exile in World War One. It was also suggested that Danilo's main reason for remaining married was to ensure he shared in his wife's inheritance.'
