"I was thinking of you this morning too" says Amy. "I wasn't sure if you would become a mermaid again, or when."
"Let me finish what I started" you say, kissing your way down Amy's chest.
"Oh god yes..." she says. "But..."
"But what?"
"But I think this will be it. Somehow I just know you wont go back to being your old self if you do this. You'll stay female."
"Isn't that what you wanted? A lesbian mermaid lover?"
"I did...I do... But I don't want your life to change forever because of my fantasy."
"You already changed forever because of mine. And the closeness that we feel together as mermaids..."
With that, you put your mouth to other uses than talking.