Who is Shamela Andrews from Joseph Andrews ; with Shamela ; and Related Writings: Authoritative Texts, Backgrounds and Sources, Criticism and what is their importance?

In "Shamela", Shamela Andrews is the main character that Fielding uses to parody Samuel Richardson's "Pamela", and she is supposed to represent the true version of Pamela's character. This story is written in the epistolary style as Shamela writes her mother to relate her design and attempts to seduce her employer, Mr. Booby. In a pretense of virtue, Shamela feigns abhorrence every time Mr. Booby attempts to seduce her, but, in reality, she simply refuses to satisfy his desire until he marries her. Eventually, her facade succeeds, but after she marries, she cuckolds Mr. Booby by having an affair with Parson Williams whom she had previously slept with. Under the name Pamela, she also appears in "Joseph Andrews" as Joseph's sister whom he holds up as a model of virtue against which to compare his conduct.