Her fine complexion, enormous dark eyes as well as her musical talents were inherited from her grandfather, the first Lord Mornington. As well she was regarded as one of the beauties of Regency London. However, though she might display her talents on the harp or piano, she kept her temperamental explosions for indoors.
On 3 July 1806 she married Sir William Abdy, 7th Baronet, but after nine years their marriage was still childless. Anne could not fail to be attractive to her husband's men friends: there were the fascinating Frederick Lamb, a well-known philanderer, and Lord Charles Bentinck, a widower of thirty-six. However, her mother and sister thoroughly disapproved of the visits of these unattached beaux. 
On the 5th of September 1815 she eloped with Lord Charles Bentinck, leaving behind incriminating letters giving proof of their intrigue being of some long standing. On 25 June 1816 she was divorced and, on 23 July 1816, married Lord Charles Cavendish-Bentinck. On 1 September 1816 their first child, Anne, was born, to be followed by three more children.
 

Source: Leo van de Pas