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

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Slouch Witch
SOLVED: Adult Fiction
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SOLVED. Romance with magic : a woman hiding how powerful she is and a wizard solving a murder [s]
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I'm looking for a book that I've read maybe 2 years ago ? Or around that time. The main color of the cover was purple if I'm not mistaken. It was a paranormal romance with mystery to solve (and maybe erotica but honestly i'm not sure)
The plot. There's magic in this world, the main character is a lazy woman who deploy much efforts to hide how powerful she is at magic, just so no one bothers her.
She helps her neighbor I think, who is very good at magic. One day when she's alone in her neighbor apartment an older witch and a wizard come over and the witch mistake the main character for the neighbor. She then lock the mc and the wizard in a bound so they can solve a murder together.
The mc is pissed and kinda silly, coming up with weird theories about the murder every time they get a clue. I just remember the (hot) wizard being quite patronizing and feeling superior before realizing she is actually making efforts to appear less powerfull than she is.
I don't know if it's enough for you to help me find what book this is :/