Sienna Blake's return to the village has stirred up tension among several Hollyoaks residents, particularly Abigail Matthews, who is clearly upset about Sienna's presence, especially since she is the ex of Cleo McQueen. Cleo and Sienna were in a long-term relationship until this year, when their relationship ended dramatically. Sienna’s time away from the village has not been easy—she has been involved in a series of troubling events, many of which were linked to Jez, who was later revealed to be a serial killer. Sienna’s life took a dark turn after meeting Jez, who influenced her to commit serious crimes. She was responsible for the murder of Ethan Williams on their wedding day and helped her estranged father dispose of the body of Dilly, who had been killed in cold blood. Earlier this year, Sienna pushed Clare Devine into a watery grave and falsely accused her own daughter of the act. She later turned the blame onto Cleo, who was suffering from postpartum psychosis at the time and believed the accusations. Cleo eventually realized she was being manipulated and confronted Sienna, leading to a dramatic confrontation that resulted in Sienna being taken into custody by the police. Now, months later, Sienna has returned to the village, and many residents remain unforgiving of her past actions. While much of the village is focused on the mysterious disappearance of Ste Hay, Mercedes McQueen is particularly upset to see Sienna back and confronts her about how she treated Cleo, warning her to stay away. Cleo is visibly shaken when she sees Sienna and is unsettled by the idea of her ex being back in their lives. Dodger Savage offers her support, but Abigail, who had been in a relationship with Cleo earlier this year, spots them from a window and takes a photo on her phone. Abigail had seen a future with Cleo, but Cleo did not feel the same and ended things abruptly, which did not sit well with Abigail. Now, with the photo she has taken, there are questions about whether Abigail might use it as leverage over Cleo following their split. Additionally, the truth about Dodger and Cleo's affair is expected to come out eventually, which could complicate things further. As Sienna's return continues to stir up old tensions, Abigail confronts Cleo about her ex's return, and it's clear that she is jealous. Cleo, however, seems unfazed when discussing it with Dodger, but whether she should be worried remains to be seen.