Anastasia Louise "Stacey" Chamberlain originally named Kelly Louise Reardon was born into the world with plenty of controversy and secrets surrounding her, even before she came out of her mother's womb. Her mother, Nola Reardon, tried to pass off the unborn child as the biological child of Dr. Kelly Nelson. In actuality, the baby’s biological father was Floyd Parker, but Nola didn't love Floyd. Nola was infatuated with Kelly and wanted the child to be Kelly's. When Bea found out the truth about what Nola had been up to, she was unable to let her daughter ruin her own life and the promising future of Kelly, and told Kelly the truth that there was no way he was the father of Nola’s unborn child. Kelly confronted Nola with her lies just before they were to leave town to marry. Defeated, Nola briefly considered an abortion, but reconsidered and accepted Floyd's marriage proposal. However, at the justice of the peace, Nola realized she couldn't marry a man she didn't love and dumped him at the altar.
When her pregnant mother, Nola, went to work for the mysterious Mr. Quinton R. McCord, there was even more interest in the unborn child. Mr. McCord seemed obsessed with discovering her true paternity. Initially Nola believed that Mr. McCord’s intentions were suspect, so kept Floyd’s identity as father from him. Eventually she learned that Mr. McCord simply wanted the father of the child to take his proper responsibility. And that he had personal reasons for wanting to protect Nola and the child. He himself had been born out of wedlock and grew up not knowing his father, Henry Chamberlain.
In January 1982, Nola went into premature labor alone at Thornway Road. She contacted Kelly Nelson to come and help her. Nola was passed out in pain when Kelly finally arrived, and Nola gave birth to her tiny baby daughter, three months premature, in the ambulance on the way to the hospital. Nola named the infant Kelly Louise. Kelly was of course after Kelly Nelson, and a delicious jab against her nemesis, his wife, Morgan. Louise was selected, as it was Floyd's mother name. Soon Nola recovered from the ordeal and was back home at Thornway Road, followed a few weeks later by her stronger and healthier baby daughter. Mrs. Renfield and Mr. McCord took great interest in Nola's infant daughter which at first greatly concerned the new mother.
In the Spring of 1982, Nola finally made arrangements to christen her baby daughter, Kelly Louise. So that Floyd would not feel uncomfortable at the ceremony, Nola nervously admitted to Mr. McCord that Floyd was in fact the biological father. Quint was surprised it was not Kelly Nelson, but also relieved to know the truth, since Floyd wanted to play a part in the child's upbringing. The Christening, however, did not go nearly as well as Nola's confession. Believing that Nola spilled the beans to Derek Colby about his burgeoning relationship with Hillary Bauer (it was really a jilted Vanessa who spilled the beans), hotheaded Tony blew the whistle on Nola about her prior summer shenanigans right in front of Floyd and Quint, all dressed and ready for the Christening. Up to that moment, dense Floyd thought that he and Nola were "in love" when the child was conceived and had no idea that Nola had actually used him as a sperm donor to trap Kelly into marriage. Floyd vowed to get custody of the child away from Nola, feeling that she was now an unfit mother. Quint was also quite shocked by the revelation, but quickly softened when he realized Nola had skipped town with the baby. When Quint discovered that his Nola had gone to London, he followed her there on the Concord, promised to help her financially and emotionally in the battle against Floyd, and brought her back home to Springfield. Eventually, Floyd dropped the custody suit.
In December of 1982, Nola decided to change her child's name to Anastasia Louise. This action was part of Nola's maturation and redemption from villainess to romantic heroine, since she originally named the child for all the wrong reasons. Hoping that Quinton would soon, at least, be Anastasia’s step father, she decided to make Quint the baby’s godfather, much to Floyd’s jealous annoyance.
Quint and Nola married with Stacey in attendance on June 24, 1983. In May 1984, Anastasia’s brother, Anthony James “AJ” Chamberlain was born.
Anastasia/"Stacey" was last seen departing with her parents, Nola and Quint in 1985. It was later established during pseudo that her name was Anastasia Chamberlain and adopted by Quinton. Presumably the adoption occurred when her biological father, Floyd, was incarcerated for murder.