Anne was approximately ten years old at the time of her marriage which had been diligently arranged by her ambitious mother-in-law.
[2] Anne later succeeded to the titles of suo jure 7th Baroness Bourchier and Lady Lovayne on 13 March 1540 at the time of her father's accidental death.
The birth of Anne's child prompted Baron Parr to take action against her to protect his own interests, lest the baby should in the future lay claim to his estates.
From the Letters and Papers, Foreign and Domestic, of Henry VIII, dated 22 January 1543, there is the following item:"Whereas lady Anne, wife of Sir Wm Parre lord Parre continued in adultery notwithstanding admonition, and, finally, two years past, left his company and has since had a child begotten in adultery and that the said child and all future children she may have shall be held bastards.
On 31 March 1552, a bill was passed in Parliament which declared the marriage between Parr and Bourchier to be null and void.
After William Parr was sentenced to death on 18 August 1553, Anne went to court and intervened on his behalf with Queen Mary I in hopes that they [she] would be able to keep their estates.
William Parr was restored to blood and was re-created Marquess of Northampton, re-elected to the Order of the Garter, and was made a privy councillor among other things.
Author Charlotte Merton suggested that Katherine Nott, who held an unspecified position in Queen Elizabeth I's household from 1577 to 1578, was also a daughter of Anne.
In response, Anne brought a lawsuit against Waldegrave and Butler which was heard in the Court of Chancery.
[1] Butler's petition was apparently unsuccessful because following Queen Elizabeth I's accession to the throne in November 1558, Anne had retired to Benington Park where she quietly spent the rest of her life.
Upon Anne's death, the barony of Bourchier passed to her cousin, Walter Devereux, 1st Earl of Essex.