She was the daughter of statesman and marshal Count Gabriel Gabrielsson Oxenstierna (d. 1673) and Countess Maria Christiana von Löwenstein und Scharfeneck (d. 1672; in turn she was the only surviving daughter of Countess Elisabeth Juliana of Erbach –later wife of the Swedish Field Marshal Johan Banér– in her second marriage) and sister of Count Gustaf Adolf Oxenstierna.
Christiana Oxenstierna replied to her brother: If You wish Your hatred and persecution to last as long as our lives, so it will; You will with no doubt be spared the burden soon enough and harm Yourself as much as others; I will not loose a thing thereby.
If You will be as a Christian, it will be as dear to me as the wish that you will give your children treasures which rust and moths can not alter, and that we will one day meet were a Count and a master Bergius will weigh as much.
[1] The court of the Swedish House of Lords made the verdict that a serious crime had been committed, but as the King had commented that the matter was but a private affair, the case was not pursued further.
She broke off her contact with her family and the nobility and spent the rest of her life with her spouse, spending her time as a teacher for poor children.