 Lady Arabella was widowed at the age of thirty-five.A nephew of Arabella Denny was William Petty, 2nd Earl of Shelburne, who became Prime Minister of Great Britain.Lady Arabella lived at Peafield Cliff House (now Lios an Uisce/Lisnaskea House), in Blackrock, County Dublin where John Wesley, who founded and led the Methodist Church, visited her in 1783.