What's the Name of That Book??? discussion

This book was written by a British author. I read it circa 2007-2009, when I was in 5th grade and so I know it is either YA or marketed to pre-teens. This author wrote a lot of books with similar themes (abusive mothers, daughters dealing with the repercussions) and I read all of them but this one I remember most vividly. The girl in the book had a mother who was alcoholic maybe but she was definitely dysfunctional, she began dating a man who had very "icy blue eyes", and the girl saw he was abusive but her mother did not. The girl also had a younger sister (could have been brother, but it was a sibling) whom she was very protective of. There is a very specific scene I remember in which the girl can't find her mother after a long night, she is with her younger sister and the power in their house goes out, and I believe the stepfather was going to harm them in some way. She is searching every drawer in the house for a flashlight and I distinctly remember the author listing every object in the drawers, then saying "no flashlight". For example: "Letters. Pens. Paper. No flashlight." This was repeated for dramatic effect. There is also a scene I remember in which the main character is walking her younger sibling somewhere and a truck passes by, and in the truck is the mothers boyfriend, and she comments about how his eyes were icy blue when he stared at them. This author was huge, I remember, I read all of her books but I cannot for the life of me remember her name or the name of the book. The setting was definitely England and the author was British for sure. Please help!

Maybe something by Jacqueline Wilson?

Omg thank you to your comment I found the author Cathy Cassidy after searching Jacqueline Wilson, it’s Indigo Blue by Cathy Cassidy!!! Thank you!

Glad you found your book, Bahar. Here's the link - Indigo Blue by Cathy Cassidy.

You're welcome. Glad you found it!