Rock Me question

Hey guys!
I've been searching for a book abut a tattoo artist who tattoo a butterfly on a girl, which is his signature on thing but she doesn't know that and doesn't find out until his ex girlfriend sees it on her while there at his shop and freaks out.

I know it's not much but that all I can think. I can't remember the title or the author. If anyone has any suggestions on what they think it is, I appreciate it.

Thank you!