Complex sentence: Grand Duke Alexei Alexandrovich was so besotted with her that he conducted an affair openly, under her husband's roof and in his full knwodlege.eugeni Leuchtenberg drank away most of his fortune, and for years he and Zenaida lived off his cousin's generosity.
Split into simpler sentences: Grand Duke Alexei Alexandrovich was so besotted with her that he conducted an affair openly, under her husband's roof and in his full knwodlege. Eugeni Leuchtenberg drank away most of his fortune, and for years he and Zenaida lived off his cousin's generosity.