Blaze's POV)
I was swimming around in the cave for a while while tails said someone will join me,as I was wondering,tails came back,with Amy.
Blaze:Amy?you're a mermaid too?
Amy:yeah...I have to stay here because can't live without water,and my bathtub isn't big enough.
Tails:now is big enough,right?
Amy:yeah, it's way bigger!
I smiled at Amy because now at least I have someone to join me,but suddenly an alarm started ringing.
Blaze:huh? What's that?
Tails:someone has broken into the workshop!you girls wait right here, I go and check what's happening.
Tails than left us and ran back up to the workshop,leaving us alone.
Amy:so,wanna talk about how did you get turned into a mermaid?
Blaze:sure.
(Third person POV)
Tails ran back up to the lab to find out that the room he stored the chaos emerald is being broken in.
Tails:someone is trying to steal the chaos emerald!who could that be?
He looked at the surveillance cameras,and found out that it was rouge.
Tails:rouge,huh? I know just how to give her a lesson.
Tails than grabbed a syringe filled with the mermaid elixir and ran towards the room,where he found that rouge was about to leave with the emerald.
Tails:going somewhere,rouge?
Rouge turned around to found out tails is standing there.
Rouge:hey there cutie,want the emerald back?
Tails:rouge,you tried so many times already,can you just give the emerald back to me?
Rouge:I would...if you can catch me!
Rouge tried to fly away,but tails took out the syringe and aimed it at rouge.
Tails:my years of archery training,don't fail me now!
Tails than throw the syringe towards rouge,the syringe hit her ass and rouge screamed in pain.
Rouge:oww!
Then she fell down on the floor with the emerald, tails picked up the emerald and walked toward rouge.
Rouge:oww...what was that for?!
Tails:for breaking in too my workshop for so many times that I can't count anymore.
Tails than grabbed Rouge's ass and squeezed it,than the other hand reached to the syringe.
Rouge:h...hey! What are you doing?!
Tails:punishing a very naughty bat...
Tails keep squeezing rouge's ass and pushed the plunger on the syringe,and the mermaid elixir injected into Rouge's body.
Rouge:hey!stop it!it's getting...a bit sensitive...
Tails:stop lying,you wanted this,right?
Rouge:no i don't!I don't wanted this...wha...why is my body getting warmer?
Tails:well...as a punishment...you will be turned into a mermaid and be a part of my mermaid girlfriends.
Rouge:wha...what?! I thought you touched my ass without my permission is enough for a punishment!
Tails:not for this case,you did this many times already.also your butt should be growing by now...
Rouge:what are you talking about...huh...my butt...is really growing!gaah!
Rouge's ass than started growing,destroying her pants in the process,her chest also expanded,her tits are way bigger now.
Rouge:well...this isn't bad...I can slap my ass harder now!
Tails:hey,don't forget that you need to say goodbye to your legs as well!
Rouge:oh yeah...aah!my legs,it hurts!
Rouge's legs started fusing together,melting into one fish tail,and her feet flattened into a fish fin.
Rouge:ok...that wasn't so painful...
Tails:you sure?
Rouge:wait...aah!oh god!something is growing on me!
Black scales started covering Rouge's tail,crawling up from her fins to her ass,covering her ass, closing her ass crack as well.
Rouge:ahhhhhh!my ass!I can feel it vanishing!
The scales reached up to her waist,and finally stopped,gills appeared on her neck,her transformation is complete.
Rouge:hah...hah...(passes out)
Tails:so,passed out already?man...you look way sexier like this ...but I needed to try something else...
(Lemon warning!)
Tails that carried Rouge up to his room,he placed him on his bed and shoved his dick up Rouge's ass.
Tails:you're not as tight as Amy or blaze,but it will still be the same.
Tails started fucking Rouge,it is then Rouge waked up from her unconscious.
Rouge:ughh...what happened...huh?ahhhhhh!my ass!it's being shoved up by something!
Rouge turned around and saw that she was a mermaid and tails is fucking her.
Tails:hey,woke up already?
Rouge:tails!!why you! You not only turned me into a fish now you needed to fuck me as well?!
Tails:well...as Part of your punishment that is...
Rouge:tails,stop fucking me now and...uhh...ahh!my head!it hurts!
Rouge started to have a headache,she felt like now that she should let tails fuck her...
Rouge:ahh!no!I can't let a fox fuck me without my permission!
But she can't resist it ,she loved the feeling that tails' dick is going up her ass,her thoughts are now the same:let tails fuck her.
Rouge:tails~ok~I'm sorry that I broke into your workshop so many times~,you can punish me by fucking me.
Tails:oh really?
Rouge:yeah...,I'm sorry...
Tails:alright!brace yourself!
Rouge's mind:why did my voice become more sexual all of a sudden?
Tails started fuck rouge faster,and rouge moans in ecstacy.
Rouge:ohh!punish me tails!punish this naughty bat!
Tails went even faster and rouge started to moan even louder.
Tails:who's a bad girl rouge?
Rouge:I am tails!I am!ahhhhhh!
Tails started to feel that he reached his limit again,while rouge felt that she is also reaching her limit.
Tails:rouge,I'm about to cum!
Rouge:ohh~me too,let's cum together!ahhhhh!
Without a moment delay,the two than came together,tails came inside rouge and rouge came on tails's dick.
Rouge:ahhhhhhhhh!oh my! It feels so good!fill my pussy up tails! Ahhhhh!!
After tails finished cumming inside rouge, he pulled out his dick and Rouge's ass kept dripping cum.
Tails:did you learned you lesson?
Rouge:yes~yes I did~
Tails:well good,I'm getting sleepy,can I use your ass as a pillow?
Rouge:uh...what?
Tails:I take that as a yes,well good night!
Tails than fell asleep on Rouge's ass,rouge moaned slightly when tails hit his on on her ass.
Rouge:well,it felt pretty good on my ass,sweet dreams cutie pie!
Rouge then fell asleep as well,and the two slept all night long.
(End of chapter 5)