“I say you make a wish about me, okay?” Lydia proposed.
“Alright.” You answer. You think about the wording for a few moments before you finally speak. “Okay genie, I wish for Lydia to have full control over her mermaid transformations; to decide for herself how when and where she either becomes a mermaid, or returns to human form.” Hopefully that covers all bases, you think to yourself.
“Now for your wish, lady.” The genie said to Lydia.
“Okay, I wish for my boyfriend to possess those same transformation abilities as applied to himself.”
“Wa…huh?!” You stutter.
Lydia flashed you a smirk. “You aren’t the only one with fantasies, you know.”
“Granted!” The genie shouts before vanishing in a puff of smoke.
Lydia felt her legs loosening and her spandex suit was no longer a part of her body. “Ah, what a relief.” She said as she took off her jeans. “Hmm, let’s try something.” She sat down on the floor. The spandex started traveling down her legs, stopped half way, and then retreated to their regular state. “Okay, that works.” Lydia grabbed your hand and dragged you toward the stairs. “Let’s get our bathing suits on and try this in the pool.”
You and Lydia stood at the side of your pool; you in light blue swim trunks, and her in a silver two-piece bikini. She dove in first and laid on her back. You witness her bikini bottom started to wrap itself around her legs, squeezing them together and melding to her skin. When the material reached her feet, they exploded into a tailfin. “Care to join me?” She asks, giving a beckoning gesture with her hand.
Without a second thought, you dive in and will yourself to transform. You feel your swim trunks start to wrap tightly around your legs.