The sun was just about to set when everyone returned to shore. You and Corey dragged yourselves out of the water and felt your tails begin to dry. As promised, their legs reformed and they promptly put their bikini bottoms back on.
"Remember," Lorelei began, "the full moon will last only through tomorrow night, after that, you will have to wait a month for us to be able to permanently transform you."
"You will be able to make us temporary mermaids, though, right?" You asked.
"We can, yes." Kelly answered.
"Okay, good." Corey said.
It was night by the time you retuned to the apartment. Once there, you decide that not having slept for more than a day, you're exhausted and went to bed right away.
You feel someone shaking your shoulder. "Millie, wake up." someone whispered. You opened your eyes to see Corey standing over your bed.
Groggily, you look at the alarm clock. "Corey, it's too early." You groaned.
"I've been up since 4:15 and... I have to know."
"Know what?"
"If my attraction to you is real, or if it was just because I was a mermaid."
"Are you saying..."
Corey slipped off her nightgown, revealing her nude body. "Millie... make love to me again."
You give her an approving smirk as you throw open the covers and remove your own nightgown. Corey climbs in, presses her body to yours, and the two of you begin making out.