Christina Boyd (Amy Robbins) has made an almighty mistake in tonight's (30 October) Coronation Street.
The beloved character has had a difficult few months, after learning that her firstborn daughter Rachel Parkinson had been brutally murdered by her husband Richie (Nathan Sussex), and that the couple's daughter Lucy (Anya Dewin) - the granddaughter that Christina never knew about - was living across the road from her.
Teenage Lucy is incredibly troubled. In a cryptic conversation with her dad, she seemed to imply that she could've been responsible for her mum's death and that he took the rap.
When her foster mother Sally Metcalfe (Sally Dynevor) found out about the connection with Christina, she made her promise not to say anything for fear of upsetting the apple cart.
However, in the latest instalment, everything changed after a completely innocent mistake.
Christina was staring at the photo of Rachel that was gifted to her by partner George Shuttleworth (Tony Maudsley), and expressed the feeling that she'd failed her daughter by allowing Lucy to be moved into a respite home due to problems with the Metcalfes.
George reassured her that the situation was out of her hands, and that Lucy was being cared for.
Later, by complete coincidence, Christina ran into her granddaughter at the precinct. Lucy was watching videos of her family, with one showing Richie whispering into Rachel's ear and clearly making her look uncomfortable.
Horrified by what she saw, Christina rushed off and dropped the keyring that contains the photo of Rachel on the floor. Intrigued, Lucy picked it up and then fired in her direction, desperate to know why she was in possession of a picture of her mum.
Inside the undertakers, Christina was forced to open up to the youngster and admit that she's her grandmother. She said that the adoption has haunted her for over three decades, and that she had no idea that Lucy existed.
When Sally and husband Tim (Joe Duttine) approached, Lucy darted off and Christina burst into tears. After tearing strips off Sally for being a bad foster parent, she made it clear that she intended to find out the truth about Rachel's death.
Although Richie has insinuated that he acted in self-defence, that footage proved to her that was the abusive one.
Will Christina be able to clear Richie's name, and what repercussions will this have for Christina?
Read more:
Coronation Street airs weeknights at 8:30pm on ITV1 or can be streamed from 7am on ITVX.
Visit our dedicated Corrie page for all the latest news, interviews and spoilers.
Add Coronation Street to your watchlist on the – download now for daily TV recommendations, features and more.
Check out more of our Soaps coverage or visit our TV Guide and Streaming Guide to find out what's on. For more TV recommendations and reviews, listen to The Radio Times Podcast.