It was finally the day where Steve was going through this experiment and Mary kept telling him that he could back out and that everything would have been fine but Steve kept saying everything was alright and she couldn't help but notice him and Peggy talking a lot once they entered the experiment room and Mary smiled at them, she knew she could never get jealous of Steve because she cared of Steve's happiness and asPeggy and Steve made their way to the chamber where Steve would be placed they talked about having a dance partner and Peggy smirked and looked at Steve and Mary
"Don't worry Steve, Your dance partner is there.. She may be in front of you." She said but before Steve had a chance to answer Peggy walked off and Mary looked at Steve in confusion but Steve said nothing and Mary shook her head and went to help Stark with getting the machine ready and soon Dr. Erskine came to Steve and explained to him what was going on and Mary came to him and she smiled as she helped Steve get into the machine and he looked a bit nervous but she smiled and intertwined their fingers together
"Don't be nervous, you're going to get through this and once we're done.. We'll go get some coffee like the old times." She said quietly and he gave a small smile before she went to go help Stark again and once the nurses finished giving him his shots Stark activated the machine and the doors closed and it was getting bright in the machine and they had to cover their eyes a bit and soon they heard Steve screaming out of pain and Erskine ordered for the machine to but stopped but Steve refused and it was getting to the point where Mary was about to push Stark out of the way and stop the machine but the doors opened and reveled Steve but he was more muscular. Everyone was shocked and everyone came up to him and asked if he was okay and Peggy was there in shock and she touched his abs for a second and Mary couldn't help but laugh a bit and she waited a bit until the crowd died down and she went to Steve and he leaned on her a bit since he was still in shock and for once in her life she looked up towards him and smiled at him and he returned that smile
"Looks like you're not the shortest out of the three of us now, you're tall and muscular." She laughed and he smiled weakly and brought his arm around her shoulder and brought her close
"Now I can actually protect you.. For real." He said quietly and she shook her head and smiled at him
"You know you don't have to, I can look after myself." She said quietly but he shook his head and looked down at her
"No, because I want to prove to you that I'm a hero and you've always came first to me and still will. You and Buck-" He got cut off as he heard a shot and a few more and he covered Mary with his whole body and he looked up and saw Dr. Erskine collapsing to the ground, he looked down at Mary who looked over in tears and they both ran to Dr. Erskine who was dying, but Steve got shot at but the weirdest thing happened.. There was no wound. Dr. Erskine looked at him and poked where the hole in the shirt was and saw there was nothing and the Doctor looked up and smiled at Steve and Mary
"It worked.." He said weakly before he took his last breath and just stared into the sky, Mary had tears in her eyes for the fallen doctor because the last few days were amazing with her and Dr. Erskine cheering on Steve as he managed to get though his training and how Dr. Erskine wanted Steve to be the super soldier since he was more humble and he had his morals unlike the others which Mary agreed on and they had a nice conversation on how great Steve was.

Steve looked up and saw Mary crying, he hated seeing her cry and he was grieving for the fallen Doctor. He saw Peggy making her way upstairs and saw vengeance in her eyes and he looked down at Mary who was trying her best to keep it together
"Mary stay here and don't do anything until I get back please." He pleaded, he couldn't stand the imagine of losing her too and sure he always had feelings for Mary ever since they were kids but he couldn't think now, he needed to help Peggy.
"I promise, just go." She said quietly and he got up and ran after Peggy and Stark came up towards her and helped her up
"I'm so sorry.. For your lost." Howard said quietly and she nodded and she looked down at Erskine and wanted to cry but Howard brought her into a hug, he was a womanizer but there was something different about Mary.. He saw her more like someone who needed to be protected and plus he's seen the way Steve has looked at her when she wasn't looking and knew that she had feelings for him too.
"It's a lost for all of us.." She said quietly and they took a moment of silence for the fallen Doctor and then they both remembered something
"We need to see if Steve is alright.. After all I believe you're the Doctor now in charge of taking care of Steve, I hope Erskine taught you some stuff before he passed." He muttered and she nodded remembering their conversation last night talking about the possible side effects and what Steve had to be careful of now.
"We need to find him." She said and her and Howard ran towards the doors and they found Peggy in the front and Mary looked at Peggy which a questioning look and Peggy sighed quietly

"Steve went after the shooter." She said and Peggy was able to get her car and they all climbed in and Peggy drove around and saw there were cars crashed around and saw Steve with a kid and she stopped dead once she saw a body on the floor and saw it was one of the attackers and they looked at each other in the eyes and it seemed like it was forever until the police sirens were coming and Mary ran up to him and checked for any wounds and he shook it off and looked down at her
"I'm fine Mary, don't worry." He whispered and she nodded and he wrapped his arms around her and brought her into a hug as the police took the body away and Peggy and Howard came towards them and asked Steve a lot of questions until it looked like Steve was getting tired and Mary had to stop them
"I think it's time for Steve to get some rest, he's been through enough." She whispered quietly as she took his hand and the large man followed and they got a cab and they drove to Mary's parents home and it was already night time and her parents were already sleeping. Mary and Steve made their way to her room and he sighed quietly as she looked at the wall just thinking of today's events and he came towards her and wrapped his arms around her waist and rested his head on her shoulder as he swayed the both of them back and fourth
"I wish you didn't see that, Dr. Erskine's death.." He said quietly and she said nothing as she remembered the doctor's death and she wanted to cry but she shook her head and he turned her around and looked into her brown eyes
"Mary, I wish I said this a long time ago but I've been meaning to tell you this and I hope this will never affect our relationship if you reject me but I have feelings for you.. Since we were children and I fell for your personality and your looks were the bonus.. I love that you're so kind and gentle from when I was hurt when I was little and you helped take care of me as your mother helped to when my parents passed away and you and your parents took me in.. What I'm saying is I don't want this war to separate us ever and I sometimes wish that everything was back to normal, but with you in my life as something else besides a friend." He said quietly, feeling of rejection and she was speechless at first until she thought about what she was going to say
"I don't want you to ever leave, I will always protect you no matter what and you know I will always have your back." He said softly and she smiled a bit and looked up at him and she chuckled at him
"I'm really glad you just admitted your feelings for me." She said softly and he looked at her shock but she started talking again
"No matter how small you were I always had feelings for you, I know everyone said that I should have been with Bucky and that we could have been married with kids but I loved you the most. You're kind and you always think of other people before others and you're just special and don't think I'm admitting my feelings because you're more muscular and stuff because no matter what you're still the same old Steve to me, never forget that." She said quietly.

He looked down at her and he smiled and he thought about something he wanted to do for a long time before he leaned down and pressed his lips against hers, she relaxed and kissed back and of course it was his first kiss ever and even though she had boyfriends at first she felt like this was her first one with that special somebody and it got quickly heated as he started to kiss down her neck and she moaned softly and he stopped for a second and smiled
"Never thought I would ever hear that sound from you." He said softly and she laughed at first and shook her head
"Way to ruin the mood Steve." She said and he smiled at her and kissed her softly on the lips and of course she kissed back and he started to take off her shirt and he stared at her body and she felt weird at first not knowing what to do and he shook his head
"I'm sorry, I didn't realize how beautiful you are." He said and she smirked and it was his turn for his shirt to come off and she stared at him for a few moments before she went on her tippy toes and kissed him softly and he smiled into the kiss and he noticed the bed right behind her and he pushed her softly onto the bed and once she was laying down he crawled on top and admired her body until he started to kiss up and down on her breasts and she moaned quietly and he laughed and kissed her softly
"Don't want to wake your parents." He said quietly and he removed her bra and his mouth went on her left breast while his hand went on her right and she never felt this way before, she loved this feeling and she wished this was done before with him and she knew that one of them could be gone at any day.. That he could be deported somewhere or she could be too and she wanted to cherish this moment well.

Steve looked up at her and he kissed he softly again before looking into her eyes
"Are you sure you want this?" He asked quietly and she smiled before nodding.

That night was full of passion and love and you can say it took almost all night long.

Author's Note:

I swear this is my first time trying to write smut and I failed badly, So I'll write what I can XD
There is a reason why I rushed Steve and Mary's relationship.. Just gotta wait!

Thank you if you're reading this! There will probably be at least four or five more parts until there's a part two, Will Mary be on that plane with him or will she be left behind?