Unknown to you, that kiss suddenly starts to change you back. You begin to feel your breasts grow back into DD cups, your penis begins to disappear and is replaced by your vagina and your body returns to its female form. It's not long before purplish pink scales appear on your legs and slowly fill your legs, turning your legs back into mermaid tails.
"I'm a mermaid again?" Ask yourself.
"Yes, I'm sorry, it seems my kiss has brought back your curse."
But you're not upset by this, instead you dive under the pool while kissing your mermaid companion passionately.
"If I have to be stuck as a mermaid forever, at least I have you as a partner." You said smiling, as the two of you began to fall into each other's embrace.