You immediately go over and pull down your choice.
‘I’ll be your legs in this.’ You say holding up the costume.
It was a muscle suit similar to Alex’s only this one was female, and came with a white leotard with a prominent A on the front were the hole in the A was a boob window. It also had a small blue cape that went half way down the back.
Alex shook his head. “No way am I being seen in that get up.”
‘You said I get to pick. And I pick this one.’ You say.
“Fine.” Alex sighed putting his costume up and starting to lower his pants. ‘What are you doing!’ You scream. Alex Just looks at you like your an idiot. “These costumes are magical remember. I don’t want clothes getting in the way of the experience. I suggest you do the same.”
You can’t argue with that and start taking off your pants, thankfully no one was in this part of the store except you and Alex.
Once you were undressed and standing with your legs in the Female hero costume waiting for Alex to climb on your shoulders. You suddenly weren’t so sure about this. You look down at the leotard keeping those toned thighs and camel toe at bay had second thoughts. What if the zipper broke, or fell off, or got stuck? What if the costumes really were only made for one person and the minute you put it on you would die your body forever becoming part of Alex’s as he left the suit unchanged? What if when the sui—
“Can you sit down so I can get on your shoulders already?” Alex interrupts your thoughts.
You sit on your cushion butt and let Alex rub his groin on the back of your head as he sat on your shoulders. You no longer cared what happened, you just wanted this over. Alex slid his hands into the arm holes and zipped up the back up to the neck trapping you in darkness.
It was dark and sweaty and smelt awful, but that didn’t last long. You felt a static shock to the back of your head, suddenly you had less control over your body, but you could feel your arms in the arms of the suit, this was weird since you knew your arms were rapped around Alex’s legs, you didn’t know how but you also knew Alex could now feel your legs now. You get the feeling both your nervous systems have merged together some how. But no time to worry about that, the damp dark sweaty space next to your cousins groin your head now occupied was getting smaller. It was getting harder to breath as it got tighter and tighter, the whole suit was shrinking. You felt your legs and Alex’s arms crushed into jelly, then the jelly filled in the empty spaces in the suit. It was getting harder and harder to tell were you ended and the suit or Alex began. But at least it wasn’t as bad as when it was just you in the suit with your head next to Alex’s c*ck. You still couldn’t see, but you felt everything around you as your’s and Alex’s skeletons merged, your organs reshaped them selves merging together into there other ones to become stronger versions of themselves, your crotch was crushed into powder but suddenly you felt an opening for air to come in. Your sperm cells were changed into egg cells and filipino tubes burrowed there way through what was once your body connecting to a fully functional female whom.
Your muscles kept filling out the suit till you couldn’t even tell that there were two boys in the costume. Your butt expanded out, straining the white leotard to it’s limits as it gives you a front wedge in your new shared vigina.
You felt Alex’s face change into a very beautiful woman, even though you couldn’t see it. Long black hair streams down her back and she clutched her chest moaning as her breasts become incredible sensitive flesh. Alex goes into the fetal position rubbing her thighs together making the wedge on both sides worse. Hormones race through you, changing your body and (mostly your) mind and way of thinking. Finalizing your transformation into a female superhero.
Once it looked like the changes are done Alex sits up on her cushion of an ass, taking in her new body to the fullest.
She licks her lips and puts a hand in her boob window, giving a tight squeeze to her breasts sending a shiver through both your spines. “I gotta say John. You sure can pick ‘em.” Alex said in her new sultry voice.
“You still in there John?” She asked looking down at her six pack peaking through the thin white and red fabric.
You were about to respond when Alex sticks her fingers in her crotch sending seismic shock waves of pleasure to you both on a level neither of you have ever felt.
Before long Alex uses both hands moving the white fabric out of the way and starts master bating as a woman. Using her newly acquired super strength to pound between her legs. She squeezes her breasts with her super strength as well with her other hand. She falls back passing out from her first orgasam as a super woman.