Once Billy awoke he found that he now had a full light blue tail and was still enjoying the orgy.
"Ooooh, wow that feels so nice, and now i've got my own tail to wrap around each of you mermaids!" Billy exclaims as he curls it around a pink tailed mermaid after feeling how smooth it is and liking the shiny look.
"Oh this is only the start, my name's Coral, and soon you will become a mermaid like us." The pink tailed one replies still on his penis which was now more aquatic and feeling even more intense pleasure as he came. "You see, our world is an Amazonian one, there are no mermen there so any boy we find we give him a good time and he turns into a mermaid before joining our pod, she also forgets she ever had a life on land or was ever a boy."
"Hmm...that probably explains why i can still remember being a merboy, but land, what? I've always been in the sea." Billy remarks swishing his tail back and forth. "What else would turn me fully into a mermaid?"
"Aside from asking that question as your upper body just took on a girl's look except for one spot and you now have flowing curled light pink hair....you will want to turn other boys into mermaids, grow breasts, a vagina, and become part of our pod forever." Coral responds as she shows you your new look in a piece of sea glass she has on hand and he cums from it.
"Hmm...call me Neptina." Billy spoke as he began to now think about becoming part of this pod and came again..."the thought of being a mermaid with very large breasts in an Amazonian pod and turning boys into mermaids...oooh that's soooo hot!"
"I see your almost ready Neptina." Coral observes once she's the last one still going and enjoying herself as much as Neptina is and lowering her seashells a bit. "All you need to do to become a full mermaid is drink my milk and you will fully be a mermaid in our pod, and once your breasts reach their full size and lactate it will be as though you were always Neptina."
"Of course." Neptina, formerly Billy obliges drinking Coral's milk quickly as his penis quickly became her vagina with her now orgasming like a girl and her chest grew up to an M-cup and lactating fully making her a mermaid. "Oh wow, now my big breasts will really recruit new mermaids!"
"That's for sure Neptina!" Coral exclaims as she places a pair of sea green seashells around the new mermaid's breasts. "That will be a bit more comfortable for you."
"Thanks, now let's go make more mermaids!" Neptina shouts.