You awake in the morning to find Joanne asleep in your arms and your legs around her...tail? No, you realize your legs are intertwined. You're surprised to find she has legs again. You wake her up gentley by kissing her and share your discovery.
Joanne gets out of bed so she can stand on her feet again. "I went to bed last night thinking I might never walk again, that I would have a mermaid tail forever" she says.
But after a moment of joy she has second thoughts. "But I remember how I felt last night too, how free and comfortable I felt. And how you looked at me, that I had become the woman of your fantasies..."
She sits down on the bed with a dejected look. "You don't find me as attractive with legs as with a tail, do you?"
You sit up in the bed next to her. "Yes, I fantasies about mermaids. But you're beautiful no matter what. But if I was going to change something about you, I wouldn't give you a tail - I'd have you just...relax. You feeling wild and free last night was even better than you being a mermaid." You lean in and kiss her passionately.
After a moment and your lips part, Joanne says "Thanks, honey. Though sex as a mermaid was REALLY good. I will miss that..."
The two of you kiss even more passionately and you're starting to feel a bit aroused.