She was married twice, the first marriage being annulled. According to her Wikipedia article, “...Lady Frances Howard was married at the age of 14 to the 13-year-old Robert Devereux, 3rd Earl of Essex. The marriage was primarily a political union; they were separated after the wedding to prevent them from having intercourse, with the view that premature sex and pregnancy was to be avoided. Essex went on a European tour (from 1607 to 1609) and when he returned Frances made every effort to avoid him. He was at the time seriously ill with smallpox, but she had also fallen in love with Robert Carr, 1st Earl of Somerset.
When she finally took the step of annulment, unable to legally represent herself, her father and uncle, Henry Howard, Earl of Northampton, represented her and drew up the libel. The situation quickly attracted public attention, and was widely observed by those with "prurient minds”…This may be a picture of a grandly dressed little girl.
Frances Carr was a central figure in a famous scandal and murder during the reign of King James I.