I Taught a Siren to Court... Then Became His Mate

Isla, a human researcher, mistakes the powerful siren Opal for a merman and even tries to teach him how to court. Instead, she becomes the one claimed as his mate. When she runs, he locks her away and makes her swallow his pearl, changing her body. Fury follows—along with buried memories of when they were best friends, and she was the one who broke a promise. She turns the tables by caging him in return, then offers her hand in honest love. In the end, they make peace and choose a future together.