The perfect trio

The Avengers (Marvel Movies)
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The perfect trio
Summary
Following the agreement to have Steve join their relationship. Bucky, Jessica and Steve are happy in their polygamist relationship. Sharing sweet and steamy moments with each other even when they are away from each other. what happens when one night Jessica admits that through her happy exterior she is sad when her guys are away? Her best friend Natasha makes a bold move. The original characters name is Jessica. I thought it'd be better than writing y/n
Note
Sorry if it sucks I just needed to set up Natasha's part right away. I swear it's going to get better
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Tony's party

It's been a three months since Natasha joined our relationship and everything has been going extremely great. Now that Natasha was here the little once of jealousy that some times showed up when we were having sex was gone. We each pleased each other, have a orgasm and then rotate partners. I know it's not the most conventional relationship but we love each other and that's all that matters. At the moment not even our teammates knew that Nat joined our relationship, they just think she's dating someone.

That might change tonight because Tony was throwing a party. Bucky and I worried that Steve might make a scene if someone dared to flirt with Natasha. He didn't have to worry about me and Bucky because the public already knew we were a couple so no one dared to flirt with us. Him on the other hand would sometimes get hit on by one of Tony's slutty guest. When that happened he would text us that he need help getting rid of the girl. Sometime Bucky and I would let him sweat it out before we rescued him and telling the girl he had to go. Of course the girls would be pissed but I would kindly remind them that Pietro was single. There anger turned to excitement before racing over to the sokovian heartbreaker. Pietro always thanked us the next morning for sending the girls his way. Currently I was out shopping for a party dress for tonight.

"What about this one" Natasha stepped out in a plunging red dress with an opened back.

"Love it. But I wouldn't wear it to the party, Steve will get jealous of all the attention you will be getting from other men." I kindly reminded Natasha.

"I still don't understand Steve's possessive behavior. Does he not trust that we won't cheat?"

"It's not that Nat, it's just he's lost so much that he's just scared he might lose us as well. Give it time" I defended Steve's actions.

"Alright" Natasha walked back inside the dressing room and changed into the next dress. A simple black dress that showed off her curves. "What about this one?"

"I love it Nat, you should get it" I kissed her cheek before she returned to the dressing room. We paid for our dresses and made our way to the apartment to get ready for the party.

*at the party*

The party was going great, the drinks were flowing and everyone was having a great time. I sat on Bucky lap while Thor and Jane were talking to us about their trip to Asgard.

"Honestly guys it's so beautiful over there" jane overly excitedly said as Thor just smiled at her excitement.

"Well we would love to go too bad Thor hasn't invited us yet"

"I'm so sorry my friends you are invited the next ti-"

"I told you to BACK OFF she's not interested" I heard Steve shouting from the other side of the room. I got off Bucky and saw Steve pinning a guy against a wall while Natasha tried to pull him away.

"Don't tell me what to do she's single I can hit on her if I wanted to" the man responded, you can tell he's had one too many drinks.

"Bucky I think we should go stop this"

"No he's got this, he's trying to defend Nat's honor" Bucky whispered

"No she's not she's with me and my other partners Jessica and Bucky ! ! !" Steve slammed the man against the wall again. Completely forgetting that he just exposed our polygamous relationship to the entire party.

"Wait widow joined your poly relationship ! ! ! ! Jess why on earth have you not invited me into it" Tony shouted as I hid my face against Bucky's chest.

"Because it's none of your business stark ! ! !" Bucky growled at Tony causing him to shut up. "I guess all of you guys know now Nat's with us" Bucky added looking at the rest of the team while saying it. "And for the rest of you, stop hitting on Steve and Nat they are taken." I spoke to the rest of the crowed that were completely silent.

"Steve let.him.go" Natasha spoke to Steve coldly. Once he let him go Natasha took Steve's hand and exited the party. Bucky saw me tense up and kissed my forehead.

"It's going to be ok Jess, they'll work it out right now. Let's enjoy the party" I nodded my head and turned my attention to our friends who have resumed their conversations.

*Natasha pov*

"What the hell Steve, I had that situation handled" I yelled at Steve as we locked ourselves in the bathroom.

"It didn't look like you had it handled the creep was all over you ! ! !" Steve responded coldly "don't you understand that you're everything to me now."

"But that doesn't mean you can threaten every guy that talks to me. Are you this harsh when people talk to Jessica and Bucky?"

"YESSSSS they are also everything to me and I will protect what is mine ! ! ! I just love you guys so much I don't want to lose you guys" then I remembered what Jessica said about how because Steve has lost so much he doesn't want to lose anything else.

"Steve sweetie you're not going to lose us" I cupped his face "we love you, I love you. But please can you try and control your possessiveness, we will NEVER leave you" I kissed him as I felt him hold my waist tight.

"I'll work on it Nat, I promise" he lowered his hands until they landed on my ass. "I love you" Steve started hiking up my dress before I jumped up on the sink. I started to unbuckling his belt and undid his pants.

"Are we really going to have quickie in the bathroom"

"Yes" I pulled down his pants and underwear. Steve started kissing me deeply as he moved my thing to the side and pushed himself in me.

"Nat" steve started moving slow rough. I gripped the countertop tightly as he started to get rougher.

"Steve move faster" I moaned. In no time he held onto my hips and started moving much faster. "STEVE ! ! ! " I shouted

"That's right scream my name " Steve started playing with my clit, not losing his pace. Our moans started getting louder and louder until we both came. I hopped off the counter and fixed my myself up while Steve tucked himself back in his pants.

"Ready to go back out there" I started fixing Steve's hair.

"Yeah let's go" Steve kissed my lips one last time before we exited the bathroom.

*Jessica's pov*

"Buck look" I pointed towards Nat and Steve who came back to the party. Looking throughly fucked might I add.

"I told you everything was going to be ok"

"Hey I have a question for you guys. Do you guys get jealous when two of you guys hook up or what?" Clint asked you could tell he really wanted to know the answers

"No we all love each other and we're more than ok if we hook up without the others. I know how much she's like a sister to you so you don't have to worry we love her so much"

"Good because I always wanted her to be happy and I know you two and Rogers will treat her right" I could tell Clint truly was happy his best friend was in a loving relationship.

"You guys look like you had fun" Bucky laughed as steve and Natasha joined us. I got up so Bucky could make room for Steve. Once he sat down I sat on Bucky's lap and Natasha sat on Steve's.

"Yes I just had to remind Steve I wasn't going anywhere" Natasha looked at Steve.

"And we're not going to go anywhere either" I added on. I leaned over and kissed Natasha.

"I could get used to seeing those two kiss" Tony snickered causing Clint to slap the back of his head.

"Shut it they love each other"

We all hung out for a little before leaving so Steve and I could get ready for our mission in two days.

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