Erica, is a young woman from Ohio who gives birth to Chandler and Monica's twins. There was initially some confusion during the adoption process - Erica had confused Chandler and Monica's file with a couple who were a doctor and a reverend respectively. However, Chandler eventually convinced Monica to admit the truth, subsequently winning Erica over despite the lie by convincing her that they had only lied because Monica so desperately wanted a child.
During a later visit to New York, Erica admitted that she was uncertain whether the father of her baby was her high school boyfriend--a football champion--or a guy who was in prison for killing his father with a shovel; however, Monica confirmed that it was the football player because what Erica did with the shovel-killer doesn't lead to pregnancy (Precisely what this was is unknown, but allegedly Chandler and Monica never do it themselves, prompting Chandler to be somewhat impressed with "Shovelly Joe"). In "The Last One" Erica gives birth, revealing that she was actually pregnant with twins--something that ran in her family--but she had misinterpreted the reference to two heartbeats as referring to her heart and the baby's. Chandler and Monica subsequently name the boy Jack (after Monica's father) and the girl Erica (after her birth mother).