Lucy Barton was the girlfriend of Arthur Parks, the Living Laser, until she broke up with him to get engaged to another man. She had been a friend of Janet van Dyne when they were debutantes together, and recognized Janet when she saw her with the rest of the Avengers as the Wasp.
Lucy Barton met van Dyne when the Avengers came to the bank of her fiance's father to investigate the crime scene of a robbery. She told her she was frightened by her ex-boyfriend Arthur Parks, who got angry when they broke up and accused her of choosing her fiance because of his money.
Parks became the supervillain Living Laser and was infatuated with van Dyne. He kidnapped van Dyne but was defeated by the Avengers and taken for psychiatric custody. Van Dyne reported this to Barton.