Following Sarah giving birth to a baby boy named Harry, it was revealed that Sarah would talk to Callum's dead body as her anxiety increases. Sarah attempts to seek help by confiding in Kylie that she can't bear to be in the same house as Callum's corpse and can't stop thinking about him. Sarah later carries Harry into the annexe where she talks to Callum's corpse. O'Brien responded to the criticisms that "Coronation Street" has been copying "EastEnders" with soap fans noting the similarities to Stacey Branning's (Lacey Turner) postpartum psychosis storyline. On the comparisons, she told the "Daily Star Sunday": "It's a shame. I'd be lying if I said it wasn't. Lacey Turner is a fantastic actress. But this is very different. Stacey's got bipolar, whereas Sarah's psychosis is centred around Callum. There were thoughts about her having post-traumatic stress disorder. But because she's had a baby and because she's got the trauma of what's gone on with Callum, it will be classed as post-natal psychosis." O'Brien also noted that the storyline has been "the hardest thing I've ever done" and she's felt a huge responsibility to get it right.