In that year she was the heir to her father, enfeoffed in the lands, jurisdictions, and offices enumerated in her grandfather's charter of 1547.
She was only three years of age at her mother's death, and was placed under the guardianship of Margaret Erskine, wife of Robert Douglas of Lochleven.
[2] In January 1549–1550, though Christina was only a young child, a contract of marriage was arranged between her and James Stewart, afterwards Earl of Moray and Regent, which would give him possession of her lands.
[2] When Mary, Queen of Scots was imprisoned in Lochleven Castle in July 1567, Robert Douglas, Earl of Buchan, was one of the few people allowed to visit her.
Her husband, as Earl of Buchan, took a prominent part in the political movements made in the minority of James VI, and he supported his brother Regent Moray in opposition to the adherents of Mary, Queen of Scots.