Karl married on 7 January 1895 in Herdringen, Arnsberg, to Countess Elisabeth Wolff-Metternich zur Gracht. They had no children.
Ambitions
Karl achieved his two greatest British goals in rapid succession. First, he was made Austro-Hungarianattache to Britain; and second, he rode his own horse, Zoedone, to win the 1883 Grand National. He was distraught when Zoedone was poisoned on the race day two years later.
Karl was involved in an affair with Lady Randolph Churchill, wife of Lord Randolph Churchill and the American-born mother ofSir Winston Churchill. She was four years his senior, a famous socialite, and one of the most beautiful women of the time, and he was completely infatuated by her. Lady Randolph Churchill has been described as being a captivating woman, whose looks and demeanor made her almost irresistible. She was powerful, having social and romantic contacts that could make or break anyone wishing to climb in social status in the Britain of the time. She later claimed that she would not have spent the time that she did with Kinsky were it not for the unfounded rumours of an affair being spread by society gossips, and her desire to spend time with him was simply for spite. However, accounts from the time do indicate that the two were involved romantically, and the only motivation for quelling the rumours was that this affair was a semi-secret one. In this period, among the upper classes, having affairs was not something unusual, and in most cases Jennie made no attempts to hide her liaisons. Partners in her affairs were well-connected and powerful men including Edward VII. She had these affairs with the full knowledge of her first husband, and they may even have assisted in his political and social standing and in his career. At the time of Kinsky's affair with Jennie Churchill, she likely wielded more power behind the scenes than did Kinsky, and it would have been he who would have benefited more from the affair. Although she certainly had friendships with many powerful men, it is unknown whether every relationship was sexual.
Karl remained in England until 1914 when Austria-Hungary went to war with Britain. Keen to do his duty, but unwilling to fight the country he regarded as his second home, Kinsky volunteered to fight on the dreaded Russian front. He survived but returned to a broken homeland and the knowledge that it was unlikely he would ever be welcome in England again. A broken man, Karl died in 1919.
