Anne discovers that the baby she is carrying is George's in Season 8, Episode 15, titled "The One Where Rachel Has a Baby". This pivotal moment unfolds as Anne, initially unaware of the baby's father, receives a phone call from Rachel, who reveals the truth about the baby's paternity.
The episode depicts a dramatic scene where Anne, shocked and devastated by the news, confronts George. The episode highlights the emotional turmoil and complexities of Anne's situation as she grapples with the revelation.
The episode's title, "The One Where Rachel Has a Baby," is a playful nod to the episode's central focus on Rachel's labor and childbirth. However, the episode also explores the emotional journey of other characters, including Anne, as she confronts the unexpected news.