Love-Letters Between a Nobleman and His Sister is a three-volume roman à clef by Aphra Behn playing with events of the Monmouth Rebellion and exploring the genre of the epistolary novel.

[1] [2] The novel is "based loosely on an affair between Ford, Lord Grey of Werke, and his wife's sister, Lady Henrietta Berkeley, a scandal that broke in London in 1682".

The author compares his passionate nature to Philander's, but encourages him to act prudently and judiciously in the art of love.

[9] Philander is ultimately successful, and at the end of the novel, he and Silvia flee their country and their families.

[9] The novel is told through letters between Silvia and Philander that give a deeply personal nature to the affair.

Meanwhile, Henrietta's sister and Grey's wife Mary Berkeley was having an affair with James Scott, 1st Duke of Monmouth, Charles II's illegitimate son.

As Monmouth later challenged his uncle James II for the throne when Charles died, the scandal gave the author considerable political fodder to pull from.

Philander's affection lessen in his absence, and both Brilljard and Octavio reveal their love to Silvia.

After a series of misunderstandings, Silvia enlists Octavio's help in her scheme to get revenge on Philander for successfully wooing Calista.

The second part ends with Silvia and her maid, Antonett, setting off for a church in a nearby village to meet Octavio.

Many new characters, such as Alonzo, are introduced and the plot contains various love affairs, disguises, mistaken identities, and personal and political intrigues.

Despite the title "The Amours of Philander and Silvia" the love between these two characters does not seem to play the major role any more (as it did in part 1).

Philander starts having other affairs, and Silvia gives birth to a child that is barely mentioned in the text.

He settles a good pension on Silvia so she can support herself honorably, but she immediately spends it on fine clothes and jewels.

Only the reader gets to know the reason: Fergusano, a Scottish wizard, made a philtre, that bewitched Cesario and attached him to Hermione.

Other evidence includes: "the fact that Behn was having money difficulties and was having trouble selling her plays by the mid-1680s, as evidenced from her letter borrowing money from [Jacob] Tonson, and that her previous plays and poems indicate that she might have the literary skill to execute Love-Letters."

Leah Orr concludes that there is no evidence that Behn did not write Love-Letters, but this alone does not mean that we should argue that she did.