Bad Girls with Perfect Faces by Lynn Weingarten

Bad girls get it done.

Sasha’s all-time favorite person is her best friend Xavier. He’s smart, funny, and strange. He’s not just nice but kind. He’s endlessly forgiving, even when maybe he shouldn’t be.

So when Xavier lets his ex, Ivy, slither her way back into his life, Sasha knows she needs to protect him. And not just because she can’t stop thinking about the night she and Xavier almost shared a rum-soaked kiss. No, it’s because Ivy is poisonous. The last time they were together, Ivy cheated on Xavier and he just barely survived.

Sasha has a plan: pose online as a guy to seduce Ivy, proving that cheaters never change. But she soon learns to be careful who you pretend to be—because you can never truly know the darkness inside of someone. Including yourself.

Told in multiple points of view.