The Sinner by Kelsey Clayton

When I was a kid, my best friend betrayed me in the worst way possible, ripping my family to shreds in the aftermath. She ruined my life in one fell swoop, and didn’t even have the heart to warn me.
Now, nearly a decade later, I’m back in the town I grew up in, determined to make her pay.
They say revenge is a dangerous game, but I’ve never been one to play it safe. There is nothing I’ll love more than to find her weakness and use it to destroy her. The lie she told all those years ago will be her undoing.
Savannah Montgomery may be queen of the rich and entitled, but she’s about to meet her match.