Sarah, Lady Pennington, née Moore (c.1720, Bath, Somerset – August 1783, Fulmer),[2] was an Englishwoman who wrote a widely read and much reprinted book on conduct for young women.

[5] At this period divorce was very difficult to obtain in England, requiring a costly private Act of Parliament, and even mutually agreed separations were highly stigmatized.

[5] Although she had received no formal education, she wrote a popular manual of conduct for young women, An Unfortunate Mother's Advice to Her Absent Daughters; in a Letter to Miss Pennington (1761).

[5] While it is clear that she considered her husband greatly to blame, she took responsibility for her own actions and argued that in such situations a woman's right to follow her conscience is more important than blind obedience to marriage vows.

[7] She succeeded in escaping the censure usually leveled at women in broken marriages and became instead an object of public sympathy; for example, an obituary in the Gentleman's Magazine referred to her "severe and uncommon afflictions".