Third person POV)
After tails had sex with Amy he went back to his workshop and have a shower in the bathroom while he masturbates in the shower.
Tails's recorder:(playing sounds of Amy moaning)
Tails:oh,oh,amy...,ohh...
He kept strokes his dick and moans.
Tails:ah,ha,oh it's coming,ohhh!
Then,he nutted on the bathroom walls,and kept washing himself,after showering,he went back to his lab to make more crystal liquids.
Tails:hmm...I think I should give this liquid a name...I know!the mermaid elixir!
Tails than put the elixir in some more syringes,and smiled.
Tails:alright,who should be my next target?
He looked out and found blaze running down the street.
Tails:blaze...maybe she can be a sexy mermaid as well!
Tails took his mobile phone out and dialed blaze's phone number and waited for blaze to listen.
Blaze(on phone):hello?
Tails:blaze,it's me! Tails!
Blaze(on phone):oh hey tails,what's the matter?
Tails:I got something to show you,can you come to my workshop tomorrow?
Blaze(on phone):sure.
Tails:ok,bye!
Tails than hung off than took some mermaid elixir and put it next to a grape juice bottle,and put it in his fridge,then he went to sleep.
Tails' mind:blaze the cat...you will be my second mermaid girlfriend...
(The next day...)
Blaze arrived at tails' workshop and tails greeted her,he told her too sit down and he go get some drinks,one of the glasses is normal grape juice,while one of the glasses is the grape juice,he added some mermaid elixir from last night.he handed blaze the one with the mermaid elixir,and blaze drank it.
Blaze:you know...this grape juice tasted weird...
Tails:what do you mean it's weird?it's fresh out of the bottle!
Blaze:no,the taste is weird and...wuh...why does my chest is growing?!
Tails's mind:yes! It's working!
Blaze:ughh...my clothes... is getting tighter,gahh!
Blaze yelled as her clothes bursted,her boobs and ass are growing larger.
Blaze:wah!tails,what was in that juice?!
Tails:you know,grapes,water...a extract from a crystal that will turn you into a mermaid...
Blaze:what?!wha...my legs...why do they feel numb?!
(Blaze's POV)
My transformation begun as my legs were starting to fuse together.
Blaze:ahh!my legs!I can feel them merging together!nnn!
I can feel my skin melting together into one,which is painful,I grabbed the sofa pillow next to me and grabbed tightly,next thing I know is my feet started flattening and became a fish fin.
Blaze:a fin?! I know I'm a cat who loves to eat fish but I don't want to become one!
Tails:well, don't worry you will still have your arms...
Blaze:tails,reverse this please!
Tails:after your tail is finished merging then I will help you fix it.
Then I moaned painfully once again as something is starting to grow from my fish tail,it's some violet fish scales,it was so painful that it was like my tail is on fire.
Blaze:nnn!ahh!gah!hah!
Tails:don't worry blaze,you will feel better after the pain is over.
Blaze:tails...stop standing there and do nothing and help me!
As I was begging tails to help me,I can feel the scales is crawling up my ass.
Blaze:ahhhhhh!my ass!it hurts!
The scales not only covered my ass,also closed my ass crack and reached to my waist,and I feel my neck is tingling and my transformation into a mermaid is complete.
Blaze:eeek!what have you done too me!!
Tails:at least you look sexy...
Blaze:I don't care,it's your fault and you better fix it tails!tails?
When I looked up he isn't there anymore
Blaze:what the?where did he go...hah?!
(Lemon warning!)
I suddenly feel my ass is being shoved up by something,I turned around,and it was tails!he shoved his cock inside my ass!
Blaze:wha?!tails?!
Tails:mmm...you're as tight as amy...
He then started moving,he kept shoving his dick up into my womb,I'm being raped by a two tailed fox!
Blaze:ahh!tails,what are you doing?! Stop it!
Tails:after I cum inside you I will!
Blaze:what?! Don't you dare cum inside me!I don't want your cum in me!
Tails:well...your not the boss of me!
Blaze:why you!!I'm gonna...guh?!
I suddenly feel my head is very painful.
Blaze:oww!what now?!
Tails it's a side effect from the elixir.
Blaze:ahh!!oh god it hurts so much!
I tried to control myself but I suddenly wanted to tails too cum inside me!
Blaze:ughh...
Tails:so blaze,do you want me to cum inside me now?
Well,now that I think about it,silver never came inside me after our last sex...I can't wait anymore! I want him to cum inside me!I want his warm cum in me!
Blaze:alright fine~!I want you too cum inside me, okay~!
Tails:well if you say so!
Blaze:please tails~give me your warm cum~my ass wants it~
Tails kept thrusting inside me and went faster, as I also realized my voice is slightly sexier now!so this must be the side effect tails is talking about!
Blaze:ahhhhhh!! Tails! Keep going! keep fucking my ass!
Tails:oh yes I will,I will keep fucking your ass,until I cum!
Blaze:than come on! Fuck me till you cum inside me!
Then tails plowed my ass for over an hour,while I kept moaning happily and loudly,his dick is getting closer and closer to my womb.
Tails:blaze, I'm going to cum!
Blaze:oh yes~!cum inside me~! please~!I want your warm cum in me~!
Tails:alright!hi yah!
With one last thrust,tails came inside me,I can feel his warm sperm in me!
Blaze:ahhhhhh!! So warm and thick! Ahhhhhhh!!
Then I came too, I covered his cock with my cum,he started filling my womb with his warm cum,and then he pulled his cock out of my ass,and I laid on the sofa.
Tails:phew!man that was awesome!
Blaze:hah...hah...thank you tails…for giving me your warm cum…
Tails:did you enjoy it blaze?
Blaze:hah…yeah~,I admit it was fun~,but how do I go back home now?
Tails:you can stay here for a while,if you wanted to...
Blaze:ok,but how are you going to give a room to a mermaid like me,I need water to survive you know!
Tails:I got it!
Tails carried me and walked to the basement of tails' workshop,he opened a secret trapdoor and walked down the stairs,and it a water cave!
Blaze: wow,I didn't know you have a water cavern here tails!
Tails:yeah, I didn't know either,It was here when I got this workshop,you can stay here now.
Blaze:ok,but I'm getting kind of lonely here...
Tails:don't worry,I'm going to find someone to join you!
And tails left,I jumped into the water,the water was very cold,but I can get used to it,now I wonder who is going to join me?
(End of chapter 4)