When she was twenty-three Anne met Mariana Belcombe (‘M’ in her diaries). Mariana and Anne began a passionate affair, which continued during Mariana’s marriage for money to Charles Lawton. Anne was heart-broken at Mariana’s infidelity. Aside from jealousy, Mariana’s marriage had other consequences for Anne. In 1820 Charles contracted a venereal disease, apparently from a servant, and Anne caught the incurable “venereal taint” from Mariana, with which she remained infected all her life.