Aaron was the son of Claire and her ex-boyfriend Thomas. Thomas was initially enthusiastic about having a child with Claire but later panicked and left her, not wanting fatherhood. Aaron was supposed to be adopted by Arlene and Joseph Stewart in Sydney before Claire began to doubt her decision and ultimately had a change of heart. Meanwhile, Claire was told by Richard Malkin, a possibly fraudulent psychic, that danger surrounded her child. Richard spent months persuading her that Aaron cannot be raised by another. However, after she couldn't sign the adoption papers, he claimed there was a couple in Los Angeles "perfect" for the baby, and insisted Claire catch Flight 815 to meet them - thus leading her onto Oceanic Flight 815. ("Raised by Another")