Here's some of what Purple Secret has to say about Adi (I'm paraphrasing):
Adi and her sister Feo (not to be confused with their cousin and friend Feo) gave 'concern at an early age'. Both girls developed severe back problems while in their early teens and while no abnormality was found in the length of the bones they still had to undergo physical therapy. Two years later it was their mental health which became the bigger concernd. Feo made 'terrible scenes' of shouting and crying which could last all day and as bad as that was, their father was even more worried about Adi who was 'more emotional still' than her sister. The two sisters were devoted to each other but these scenes eventually took a toll on their relationship with their parentsand their physical development worsened at the onset of puberty. Their family doctor believe that with exercise, fresh air and the right treatment the physical problems could be overcome. It was his belief that Adi at least had simply grown too fast. Feo was sent to spend time with her grandfather and his second, morganatic, wife and continued to suffer physical problems. Adi meanwhile was sent to the Bavarian Alps since she was at the 'stage of rapid development, more than Feo' their father wrote. Her family was also worried by more symptoms: horrible eczema on her head and the roots of her hair becoming diseased. For this the doctor recommended peat baths yearly on 'account of her weak mucous membranes'. She also took a turn visiting her grandfather and her step-grandmother had their doctor take a look at Adi who apparently gave a rather disturbing diagnosis which 'really shocked' her parents who nonetheless hoped it was something that could still be outgrown. Feo was developing a stomach disorder and body sensitivity. In 1911, Adi was sent for a massage cure in Hanover that her mother hoped would alleviate her 'flatulance & colic pains'. Somewhere along the line she must've met Prince Adalbert who in 1914 began writing passionate letters declaring her love for her first to her step-grandmother and then Adi herself. Adi must've returned his feelings because she rushed to Wilhelmshaven where Adalbert was serving and married in August 1914 as the war was beginning. In 1916 she began to complain of feeling sick and very weak which the doctor attributed to anemia and recommended fresh air. The condition worsened however to a serious inflammation of the kidneys accompanied by a high temperature. Adalbert was very worried about her, as was Dona, and both asked to be kept apprised of her condition daily and Adalbert sent his own doctor from Wilhelmshaven. She was given various cures and while her fever decreased, she was still pale and dizzy and weak. Adalbert was hopeful that with the new cure her anemia 'could be treated more successfully!'. During a cure at Bad Neuenahr near Bonn she seemed be recovering somewhat, receiving daily arsenic injections for her dermatological problems and gaining some strength back. Soon however her complaints were back and she was becoming frustrated at the continuous diagnosis of severe anemia and abdominal pains which nothing seemed to alleviate. She would suffer an attack of fever so severe that Adalbert was summoned from his duties. Her health from late 1916 seemed to improve. Not much is known of her health from 1918 (with the death of her step-grandmother the correspondence that track a lot of her problems ended). Adi survived her husband by several decades, finally dying at 80, alone Villa Mandragore on the shores of Lake Geneva in 1971. The notice placed by her children in the papers gave only a faint hint of her decades of physical struggle saying that she died 'apres une maladie courageusement supportee'. Family members today believe she suffered from porphyria.
