That Sik Luv by Jescie Hall
This is a Dark Romance book, which follows Briony, who is a catholic (I believe) girl whose life very much revolves around her religion and her church. Briony has been taught that fornication is a sin and that sexual thoughts and actions are immoral. Briony has a stalker who brings out these feelings in her, and she is fighting with herself over what she has been taught and the way her stalker makes her feel. Aero is the demon who has been stalking her and showing her the truth of the church she lives for, along with the truth of the people around her. This book is dark, thrilling and sexy.
This book has many trigger warnings, some of which are stalking, religious trauma, degradation, depictions of violence/murder and many, many more. Make sure you read them unless you’re like me and you don’t really have any triggers.
She broke my fucking finger, and the blood instantly rushed to my groin.
My fiesty little bitch enjoys bringing me pain, and its entirely unfortunate for her that her little outbursts trigger me further.

