Following Daisy's marriage, she became a celebrated hostess and socialite, often hosting or attending lavish parties and gatherings. She and her husband were members of the '
Marlborough House set', headed by
Albert Edward, Prince of Wales (the future Edward VII). Beginning in 1886, as was the unspoken 'code' for aristocrats of her set, she became involved in affairs with several powerful men, most notably the Prince of Wales. Tanganyika Concessions Ltd was notorious for
stock manipulation – during one period of a few days the price went from 2 pence to 13 pounds per share and then crashed. Lady Warwick had a passionate affair with
Lord Charles Beresford and was outraged to learn of Lady Charles Beresford's pregnancy during this time. Questioning Lord Charles's loyalty to her, she dispatched a letter to him over the matter. Daisy was unaware that Lord Charles had instructed his wife to open his mail whilst he was away on campaign and thus Lady Charles became aware of the affair. The letter became a point of dispute and was the reason Daisy acquired the epithet "Babbling Brooke". Others who read the letter, including Charles's brother,
Lord Marcus Beresford, agreed it "ought to have never seen the light of day". Lady Charles handed the letter to
Sir George Lewis, 1st Baronet, a solicitor who acted for many society figures, for safekeeping. Lady Warwick attempted to pull rank and appealed to the Prince of Wales. Arguably, the incident effectively cemented Lady Warwick's superior social standing, as the Prince acquired the Countess as his own semi-official mistress. The Prince hoped to convince Lady Charles to give up the letter for its destruction, but she gave Lady Warwick an ultimatum: stay away from London that season and the letter would be returned. Lady Warwick refused, and the Prince of Wales made the situation worse by hinting to Lady Charles that the position she and her husband held in society would be endangered. This angered Lord Charles enough to push the Prince of Wales against a sofa. The Prince forgave Lord Charles for his actions, but the scandal placed a strain on the friendship of the two men. The quarrel lasted until Prime Minister
Lord Salisbury intervened and both parties reached an agreement. Nevertheless, the relations between Edward VII and Lord Charles remained weak for the remainder of their lives. For almost a decade Daisy was a favourite of the Prince of Wales. She nevertheless formed her own attachments elsewhere. She fell hopelessly in love with a faithless millionaire bachelor,
Joseph Laycock, who served as an army officer in the
Boer War, and was the natural father of two of Daisy's children, Maynard (born 21 March 1898), and Mercy (born 10 April 1904). When she became pregnant with Laycock's child, the Prince of Wales, although still fond of her, insisted that a distance be kept between them. However, Laycock was also in an affair with Kitty, the
Marchioness of Downshire. When the
Marquess of Downshire threatened divorce over her affair, this
menage-à-trois caused scandal. Laycock married Lady Downshire after her divorce. At this time Daisy concentrated on the schemes which she had begun to address social inequality, including the education and feeding of the children of the poor and the education and employment of women. She formally joined the
Social Democratic Federation and campaigned in support of candidates from both the SDF and the
Independent Labour Party. Nevertheless, her lifestyle, money spent on charitable projects and years of lavish entertainment and socialite pursuits had depleted the immense fortune she had inherited from her grandfather. ==Later life==