He Knocked Up a Mermaid

During a passionate one-night stand with Edward at a seaside villa, Cecilia accidentally reveals her true form as a mermaid and leaves behind a rare mermaid's tear. Six years later, she crosses the ocean with her son, Morgan, seeking help from her friend to arrange for him to attend school in human society. When Edward learns the woman from that fateful night has returned with a kid, he rushes to find her.