"For you new form, you...we will vary depending on the moon. Most of the time you will be human. But when the moon rises 3 days before each full moon, you will turn into a mer-person: human from the waist up and with a dolphin-like tail from the waist down. When the full moon rises, you will turn completely into a bottlenose dolphin. When the full moon sets you will return to your mer-dolphin form and when the moon sets 3 days after the full moon you will be human again. This change will repeat every full moon. While transformed, you will retain your full human knowledge, memory, and personality but also have complete knowledge how to use your body. You will also remain the same gender as a mer-dolphin and a full dolphin as you have as a human - female for you and male for me, of course. And when in human or mer form you can breathe either air or water. All of which also applies to me of course. I think that should cover everything."
Jennifer thought about this. Alternating between human, mermaid, and dolphin forms would certainly be interesting.
She felt an odd sensation and realized the transformation to her new form had begun. But she realized she didn't know what phase the moon was in. She looked up and saw...