(Credit goes to superflash2034)
"What is it, Barry?" Carol, formerly Kara, asks him as soon as she shows up and he lets her in the door, gently closing it behind her.
"The other Kara, my Kara, was worried about you, and we discussed things. She wants to know if you wanna have a threesome between the three of us." Barry says, while his Kara listens in on them.
Barry waits for Carol to collect herself.
Kara or Carol was taken aback by this not knowing how to respond or act, she was completely frozen.
"Kara, your doppelganger told me that you love me." Barry says, "Or at least, you love what I represent. You've had plenty of time to get to know me. Surely there must be something of myself that you genuinely love and not just because I remind you of your dead lover."
Barry waits for Carol's response.
"I'm sorry, it's just, no one has ever proposed to me before." Kara/Carol said, smiling at him.
"Kara, I know you're listening...Do you want me, Carol and yourself to become a thropple depending upon how well the three of us enjoying fucking like animals?" Barry teases his girlfriend.
"And do you want some sexual healing, Carol?" Barry asks, again.
Carol nodded with a big smile on her face.
Barry kisses Carol full-on the lips.
Barry phases their clothes off while he and Carol are kissing each other with passion.
They pull apart gently and examine each other's naked forms.
"Wow." Carol said, smiling grandly.
"I'm going to enjoy this," Barry says as he mounts Carol's pussy while they fuck each other on the couch.
Barry bites Carol's considerably larger breasts as Kara watches from afar.
Barry furiously fucks Carol.
"Oh Fuckkkk You're so good at this," She moaned. Barry smirks with her nipple still in his mouth and then switches to her other nipple. He continues to suck on her nipples and make Carol moan.
"I don't think I can resist impregnating you, Carol." Barry warned her as he fucks her hard and fast.
"OH GOD YES!" Carol moaned as she kissed Barry's neck and behind his ear. She wrapped her legs around his waist, trying to convince him to go deeper. Barry smiled and fucked her harder and faster.
"Fuckkkk I think I-I'm gonna Fuckkk," Barry warns as he continues fucking her. Carol moaned louder and louder as he picked up speed even more and lightning formed around them.
"I-I d-don't kn-know if I can FUCK! " Barry says as he fucks her really at incredible speeds.
"GOD FUCK YES! YOUR COCK FEELS SO FUCKING GOOD! FUCK I'M GONNA CUM!" Carol squirted the hardest that she had so far but Barry didn't stop and kept pounding her pussy.
"I-I c-can't hold b-FUCK!" Barry screams as he tries to pull out.
"NOO DONT PULL OUT CUM IN MY PUSSY! FLOOD ME WITH YOUR CUM!" Carol came again and all the wetness caused Barry to burst inside her. Painting her insides white with all of his warm jizz.
"Holy shit!" Barry screams, "It's still going!" Barry's cock was still shooting sperm.
Carol started seeing stars she never felt that much pleasure in her life.
Barry felt a hand on the back of his neck "My turn," said Kara.
Barry smiles and runs to the bedroom with her clothes burning because of how fast Barry ran.
Barry fucks Kara hard and fast, and kisses her wildly as he does it.
"FUCK! BARRY!" Kara screamed.
"I don't want this day to end!" Barry shouted as he fucked Kara.
"I want to try something," Kara said. Kara grips Barry with her legs flying the both of them to the ceiling while Barry fucked her.
"Holy shit, this is the best day of my life!" Barry declared as he fucked Kara in mid air.
"Oh, god, I fucking love you Kara." Barry says as he fucks her.
"FUCK!" Kara yelled. Her eyes started glowing as she got closer to her own orgasm.
Barry was thrusting into Kara with blinding speeds. "FUCK KARA I THINK SHIT!!" Barry yelled.
"YES FUCKING CUM INSIDE ME BARRY GIVE MY PUSSY YOUR THICK FUCKING LOAD!" Kara screamed as her heat vision went off a little bit towards the right. She was careful not to hit her lover with it.
The couple slowly started flying back down, unknown to the both of them an egg is being fertilized by Barry's sperm.
"Fuck!" Barry screamed before falling on the bed.
"I should have let you fuck me years ago," Kara whispered in Barry ear.
"I don't know if I can ever top the first time, you and I fucked." Barry says, honestly.
"You fuck me so much better than Mon-El, did. You're an upgrade, Barr," Kara said before drifting off to sleep.
The next morning, Barry woke up in the same bed as Kara and Carol, and he smiled and cuddled with them.
Barry's eyes started coursing with orange lightning as he sped to the kitchen making breakfast.
Barry was making pancakes, eggs, bacon and sausage and the smell drifted into Carol and Kara's respective noses.
Once Kara smelled the bacon she ran to the kitchen with Carol following. "IS THAT BACON!?" Both doppelgangers yelled.
Barry smiled and kissed them both but Kara didn't let go and started full on making out with him.
"Okay, okay eat now eat," Barry said, pulling away.
"By the way, last night was amazing." Barry told them as he ate his food.
Barry heard someone at the door and ran to see who it was.
"Hey, Kara I..." Lena didn't even finish her sentence she just started at Barry.
"Forgive me, I don't know who you are." Barry told Lena.
"Umm, I'm Lena Luthor," She introduced herself, "Barry Allen. So, are you um, Lex Luthor's..." Barry trailed off, unable to find the right words.
Barry looked at Lena's outfit and kinda got hard, "Fuck, I hope she doesn't notice," Barry thought to himself.
Lena saw how Barry looked uncomfortable and looked down seeing how hard he was.
Barry gently grabbed Lena and ushered her into the kitchen where Lena Luthor saw two versions of Kara Danvers...
"So, Kara. I've finally met that friend you didn't wanna introduce me to." Barry tells Kara.
"uhnh um I-I uhh" Kara stuttered.
"Why don't you just moan for me, baby? Like you did last night when I was fucking you." Barry teased Kara in front of Lena.
Lena looked at Kara and raised her eyebrow.
" I-I hmmm uhh," Kara stammered helplessly.
