William Seymour, 3rd Duke of Somerset (1652–1675) and Elizabeth Bruce, Countess of Ailesbury (died 1697) were Anne's half-siblings from her mother's first marriage.

It is possible Lady Coventry was involved with Jacobite activities along with Astell and her own elder sister Mary Butler, Duchess of Ormonde, but was never publicly accused of it.

[2] She was also among the subscribers to George Ballard's 1752 Memoirs of Several Ladies of Great Britain, who have been Celebrated for their Writings or Skill in the Learned Languages, Arts and Sciences.

In addition to religious texts, the catalog of her library showed an interest in contemporary works through a large collection of plays, including some rather racy comedies.

According to Emma Major in the Oxford Dictionary of National Biography, these racy plays reveal a "sophisticated broad-mindedness that reflects her involvement with fashionable life.