She and her husband, Bill, first appeared to take Astor and Cody on a trip with them while Dexter, Rita, and Harrison would catch up.
When they came back they found out that Rita was murdered by the Trinity Killer and went into shock. For a brief time the children lived with Dexter until Astor wanted to move in with her and her husband. They eventually became Astor and Cody's legal guardians while Dexter keeps Harrison. They eventually come down to Miami for Harrison's birthday to the surprise of Dexter. They then reveal that Astor and Cody want to spent the summer with Dexter.