You answer: "Becuse I think you're beautiful!"
The mermaid blused becuse of these words. Trying to be gentle you introduce yourself by saying your name. The mermaid respond: "My name is Sirenia, human."
Later at your house, you began to dry off the mermaid to see what will happen(PLZ excuse my spelling). To your surprize the tail split into two and became perfect legs. The mermaid didn't know that she was naked, but what to do now?