A/N: Alright, another request for my friend Optimus' girl. I loved the idea, so this one will be quite a long one-shot. But it'll be worth it. Got stuck a bit but it turned out wonderful in my mind. Hope you enjoy. And honestly I heard Everytime we touch by Cascada when I wrote this and it helped with the making of it. I apologize for taking so long. I got stuck a lot actually. And parent-teacher conference is soon so I have to make sure my grades are up to where I want them.

Bumblebee/sparkbond/com. link/ sibling-creator bond/thoughts

Main Paring:

OptimusxKnock Out

Child(s): Bumblebee, Smokescreen

Warnings: Kissing, mentions of interfacing, birth (bit graphic), reuniting, end of war, cuteness, fluff, AU

Disclaimer: I do not own Transformers. Only Hasbro.

He was struck hard by the sheer beauty of the red and blue warrior. It was the beginning of the war and already there were masses of dead soldiers and innocence citizens on both sides. Knock Out was doing field repair when his optics caught the sight of Optimus Prime himself. Right then, the medic knew he must have him. His spark called out to the leader of the Autobots. Said bot had also seen the medic and stopped fighting. Neither knew what was happening at the time. Megatron called for a retreat, but Knock Out didn't follow. Instead he hid, making sure the enemy leader saw him.

"Prime, ya comin'?" Ironhide called to his friend.

"I will be along shorty," Optimus answered. He waited for his troops to depart before walking towards the medic. "I know you are there."

Knock Out poked his helm out, looking for anyone else. Finding it clear, he fully emerged from his hiding place. Optimus looked down at the red mech, gaping slightly at how handsome he was. The medic looked around once more before motioning the larger to follow. Optimus followed blindly, already entranced and submitting to the mech he just met. They went underground to a very well hidden cavern. No one would detect or find them. Knock Out purred seductively, tracing the larger body before pushing him to the ground to see optic-to-optic better.

"What's your name Sweet Rims?" Knock Out asked, circling his leader's enemy like a predator.

"Optimus Prime," the mech answered, slightly dazed.

"Well Prime, my name is Knock Out. I studied under Hook. I know there are rumors about him taking an assistant, but not knowing who," Knock Out said. "Hmm, who knew the Autobot leader would be so sexy."

~~~000

Optimus found himself meeting Knock Out every chance they got. Both would send private, encrypted messages to each other everyday. Both became addicted to the other like rich high grade. Optimus also found himself being the submissive one, much to both bots' surprise. Today, Knock Out had just proposed to the mech he had been seeing for months.

"Oh Knock Out, of course I'll bond with you," Optimus gasped.

"I want to tonight. I want to always feel you," Knock Out growled possessively. ""You are my everything. You, Prime, are the reason I fight for freedom, our freedom. And no matter what goes on, I'll be there for you."

Optimus cried softly, smiling in happiness. Knock Out kissed him, servos roaming overheating plating. It was the best day for both of them. It was as if nothing in the world mattered anymore, just them together in that moment.

~~~000

Optimus sat in his office, going over reports. There had been many reports on injured and fatalities. Prowl and Ultra Magnus took most of the reports, needing to keep their minds distracted. Jazz had went missing and it was taking a heavy toll on Prowl. His computer terminal beeped with an incoming message. The Prime opened it, knowing it was from his mate.

'Sweet Rims,

I'll be leaving on an extended mission. I don't know where we are going or when we'll be back. I know it won't be for years at most. I tried to stay, but orders are orders. I'll try to send messages if I can. I love you.

-Knock Out'

Optimus quickly sent one out in reply. He would miss the mech, but couldn't do anything about it. Love was pulsed through the bond from Knock Out's side. The red and blue pulsed back, going back to his reports. A knock on his door distracted him. He called for the visitor to enter, looking up from his work. He smiled at who came in.

"Ratchet, what brings you here?" Optimus asked. The medic set a cube of energon on his desk.

"You forgot to refuel again Orion," Ratchet lightly scolded. "In addition, we found Jazz."

"Is he alright?" Optimus asked.

"I don't know mentally. Physically he's fine. He kept muttering about 'Cons. His visor was taken, leaving him blind to any attacks. The wreckers brought him in. Prowl's not leaving his side for a while either. He refused," Ratchet reported.

"I see. Keep me posted on Jazz's condition," Optimus nodded. Ratchet simply left with a small smile. Ultra Magnus entered shortly after the medic left. "Hello Ultra Magnus."

"Prime, I would like to request sending troops out to follow Decepticon scouting ships. Megatron is ordering his men to find new energon sources. There will be a total of three ships leaving," Ultra Magnus said. Optimus stayed silent for a while.

"I will grant this. Ensure no one attacks unless absolutely necessary," Optimus ordered.

"Of course sir," Magnus bowed.

Once the officer left, Optimus sighed in defeat. It was a hard choice, but the Autobots need more energon. They were running low on the precious fuel. Sparklings, younglings, and sparked bots got fuel first. Then the femmes and elderly, and finally the others. Optimus usually got his ration after everyone else, which could be days at a time.

Checking the time after getting through more than half the data pads, Optimus decided it was time to recharge. He went to his messages and sent one last message for the night.

'Knock Out,

I wish you the best of luck on your mission. Do not be alarmed if some of my soldiers are following. They are under strict orders not to attack. We are also looking for energon. My Autobots are slowly dying from lack of the fuel. Please be safe and return when you can. I love you.'

Optimus signed off and headed towards the medibay. He went to Jazz's side and placed a servo on his chest. Prowl slept next to him in a chair, forehelm resting on the berth. Both looked exhausted and spent. He left the two bonded to go to his berth. A message was sent, saying that his bonded wouldn't leave for a couple days and that tomorrow night they would meet.

~~~000

Three months. That's how long Knock Out had been away. There were no messages from either side. Optimus became worried, hoping nothing had happened. Sadly, that wasn't the case. Prowl sat in front of the Prime, data pad in servo.

"Any news on our men?" Optimus asked, fearing the answer for a reason he could not explain.

"Yes. One troop found a large source on an uninhabited planet. Only our side survived the battle for the planet," Prowl reported, handing over the datapad. "These are the mechs killed on both sides. There was one dead for us."

Optimus scrolled through the list. He recognized many of the faces next to their names. And right underneath Breakdown was his worst fear. His mate's face appeared with his name. The leader managed to hold back a sob of despair. Prowl watched for any reaction, only finding a pained one at the final mech.

"Sir? Are you alright?" Prowl asked.

"Y-yes. Thank you Prowl. You are dismissed," Optimus whispered. He searched the other side of the bond, finding nothing. He cried brokenly, knowing his love was gone. "Oh Knock Out. I'm so sorry."

Optimus was attacked by sudden pain. He clawed at his desk, spark sending blinding pain through his body. He feel to his knees, gripping his chest. Letting out a small cry of pain, Optimus managed to hit the medical emergency button. Darkness threw him into its black abyss.

~~~000

Blue optics onlined to a dim room. Optimus sat up, looking around the medibay room. He was attached to a monitor, his sparkbeat slowing down from its rapid pace. Ratchet came in, staring at the data pad in his servo with disbelief.

"Ratchet, what happened?" Optimus asked.

"First, did you know you were sparked?" Ratchet returned. Optimus shook his helm. "That's what happened. Their sparks moved down to the growing protoforms. As far as I can tell, they are healthy sparklings."

"I'm sparked," Optimus repeated, servo going to his abdomen.

"Who's the sire Orion?" Ratchet asked, sitting on the edge of the berth.

"The sire. The sire is dead Ratchet," Optimus whispered painfully.

"I'm sorry to hear that. You know that we will help raise both of them," his friend reassured. "Get some rest. You'll need it for the twins to grow right."

~~~000

Weeks flew by and Optimus began to show. Word spread quickly about his condition. Prowl, Jazz, and Ultra Magnus did his work and had him rest. Ratchet said light duty only until there was a few weeks left.

"Orion, I brought ya some energon," Ironhide said, setting two cubes down on the desk. "How are they?"

"They won't stop kicking and moving. Ratchet says anytime now hey will be sparked," said Optimus. "The main concern will be if they have doorwings or any of the sort. It could cause complications."

"It'll be worth it," Ironhide smiled. "Everyone is wondering who the sire is. There's a bet on who it is."

"The sire is dead. He was announced dead before they moved down," Optimus said sadly. "I do not wish to reveal his name until absolutely necessary."

"I see. Well I'm sure they'd be great younglings. Hopefully this war ends soon. It would be a same if they grew up in fear," Ironhide said with hope.

"I do as well. I just wished that the sire could be here to see them," the other agreed.

~~~000

"How you doing?" Breakdown asked, bringing a raw energon crystal to his partner.

"Doing better. I still can't seem to remember much about this feeling in my spark. It's like I'm with someone or bonded to them, but I can't remember ever being with them," Knock Out huffed.

"Seems like that surprise attack did more damage than we thought. It's been months and you still can't remember," Breakdown said, sitting next to the medic. "The ship is almost ready. Then we can find a new source of energon, one where Autobots aren't."

~~~000

It was really late when Optimus went into labor. Ironhide remained at his side the whole time. Ratchet monitored his leader as they waited. Prime cried and grunted in pain, fresh tears replacing old ones. Two hours passed before the first sparkling was almost there. Ratchet swore, making Optimus nervous when the sparkling wouldn't move.

"Calm down Orion," Ironhide soothed.

"Nothing to worry about. This one has doorwings and your valve isn't big enough. I'll get this one and cut the other out. You'll be too damaged to do anything else," Ratchet explained, working the doorwings out.

Optimus arched and screamed, his body tearing. Ratchet cleaned the sparkling, letting him cry. He numbed his oldest friend and got the other sparkling out. The red and blue Prime trembled, glad it was finally over. Ratchet checked over each mechling before handing them over. The oldest was yellow and black, large blue optics staring with interest. His twin was white with bits of red, his optics also blue. Both had little doorwings, which fluttered in the cool room. The other two mechs smiled at the single creator with the newborns.

"They look wonderful Orion," Ironhide praised.

"Both are healthy mechs Orion," Ratchet informed. "Have you picked names?"

"The oldest is Bumblebee and the other is Smokescreen," Optimus whispered.

"Wonderful names. I'll leave you for now," Ironhide said.

"Once you feed them, you can rest. I'll clean up here," said Ratchet.

~~~000

Bumblebee and Smokescreen grew up fast. The years passed by, each Autobot helping in raising the twins. Smokescreen went to the Elite Guard while his brother became a scout. Optimus only allowed Bumblebee to go out when there was little to no danger. Sadly, one mission ended in horror.

Tyger Pax had been attacked and a scouting group went to look for survivors. Sadly, Bumblebee was attacked by Megatron himself, losing his voice and left at Death's door. Ratchet worked for hours, saving everyting but the scout's voice.

"I came as fast as I could when the news came in," Smokescreen panted, stopping in front of the medibay and his carrier. "Is Bee alright?"

"Ratchet just informed me that he will live. However, Bumblebee has lost his voice," Optimus informed. "We can see him tomorrow when he wakes up."

"I'll stay for as long as I can. Commander Kup let me come to check on him," said Smokescreen. "It'll be tough for him, adjusting and all. I will give Bee all my support."

"Thank you Smokescreen," Optimus smiled.

~~~000

Thousands of years came and went. Optimus now had a small team with him on a planet called Earth. He did not know if other Autobots survived, but hoped they got his message. The human children played their games until the computer beeped. Bulkhead took Miko with him on the energon scouting so that she could do a report.

"Bumblebee, is something bothering you?" Optimus asked his son, seeing him staring off into space.

"Yeah, I'm fine," Bumblebee replied. Optimus looked at him with disbelief. "No. I've been thinking about Smokey and sire. I never met sire and Smokey could be dead."

"Your sire... your sire died before you two were sparked. He would of loved you, but a team of Autobots killed him. I don't know who it was," Optimus said, choking a bit. "As for Smokescreen, I'm sure he is still alive. I can still feel him, even if it is faint."

"I miss him carrier," Bumblebee sighed.

"I miss him as well," said Optimus, hugging his son close to him.

~~~000

That voice. Optimus recognized it anywhere. A red Aston Martin pulled up beside him. The Prime transformed and caught the missile aimed at the building. Turning his attention back on the enemy, he was struck by intense pain. Knock Out kept the Prime pinned, his memories becoming fuzzed. The Prime looked very familiar.

'Where have I seen him before?' Knock Out thought.

Soundwave called the two 'Cons to retreat. As Knock Out drove away, his thoughts returned to the mech that he just took down. His spark sang for the Prime, wanting to be with its other half. Breakdown noticed the silence and decided to break it.

"Hey Knock Out, what's on your mind?" the blue mech asked.

"That mech back there, the Prime. When I saw him something stirred in my spark and memories. I can't seem to remember where I know him from," Knock Out said.

"Maybe some recharge will help you. It could be that your memories are returning," his partner said hopefully.

"Good idea. C'mon, let's hurry," Knock Out revved.

~~~000

Optimus couldn't stop his spark from racing. The one he believed to be dead for thousands of years was alive. He didn't know how, but thanked Primus that he was back. The Prime tried the bond, barely feeling a small flicker. It was hardly noticeable unless one concentrated hard. There was still a connection with them. He tried for days to contact his mate, getting no luck. The computer beeped and Ratchet informed his leader about finding the Decepticon ship and also an Autobot emergency beacon.

Heading towards the ship of possible injured Autobots, Optimus kept his form neutral. Upon the ship was nothing but dead, infected bots. Ratchet warned against touching anything, fearing the virus could still be active. Sadly, Optimus had a few drops hit his optic when the ship shifted. All he felt was pure agony and the fear from his son.

"Bumblebee stay back," Ratchet barked when he carried Optimus to the medibay. "He could be contagious. We don't need you getting sick."

"But will carrier be alright? He's hurting so much," Bumblebee said, wings drooping with his saddened emotions.

"I don't know yet. It could be- oh my. Optimus is infected with Cybonic Plague," Ratchet announced.

"What? But that stuff kills," Bulkhead exclaimed.

"I know. There is no cure for this," Ratchet said, mood deflating. "I'm sorry Optimus."

"Carrier? You can't die! I won't allow it! You are everything to me! I lost sire, I don't want to lose you," Bumblebee choked out, body shaking as tiny, wet droplets fell from his optics.

"Bumblebee... your sire... he's alive," Optimus whispered. "I saw him... days ago. He... he was a...at the museum."

"But no one was there besides us, Breakdown, and oh Primus," Arcee realized. Optimus nodded. "You mean Knock Out?"

"Knock Out? But he was on the deceased list with Breakdown and five others," Bumblebee said.

"Knock... Out is your sire. I... cannot explain why... he lives. Bee... if I die, get your sire to come," Optimus requested. "He will... understand."

~~~000

"I remember now!" Knock Out shouted from his work.

"That's great KO," said Breakdown.

"Prime is my mate. We talked last before the mission. Then we were attacked and I lost them," Knock Out said, grinning widely. "I have to contact him. I have to be with him again."

"Slow down. Soundwave will be watching. When Megatron wakes up, he'll tell him," Breakdown said. "We'll go on our drive and then you can contact him."

Knock Out bounced with joy, willing time to go by faster. Hours later the two of them went out for a drive. Knock Out fiddled with the com. link frequencies until he got the right one. He waited for any response back. Instead a groundbridge appeared with Arcee coming out, motioning for the two to follow. Knock Out raced into the Autobot base, looking for the one his spark chose. He found him, weakened and in pain.

"Knock Out?" Optimus whispered hoarsely. Knock Out went to his side, avoiding the infected areas.

"I'm here Sweet Rims. I'm so glad I found you," Knock Out whispered back. "I lost my memories during that battle for the planet. Breakdown managed to hide us before we were killed."

"Thank... Primus," Optimus coughed. "I don- ah... don't have much... time left. I want... you to meet... your son Bumblebee. His twin... isn't here."

"My son? I have two sons?" Knock Out breathed out, turning to the scout. "Bumblebee is my son. You must of been sparked that night before I left."

"Yes. Bumblebee and Smokescreen... have grown up... with fine soldiers. I... only wish we... could be together again," Optimus murmured.

"He has Cybonic Plague. With no cure, he will die in mere hours," Ratchet said, sorrow and sympathy in his words. "There's nothing I can do."

"I have a cure. Shockwave gave it to all the medics in case the others got infected by accident," said Knock Out, pulling up the file and uploading it to a computer. "Hurry. I want to stay by his side. I don't want to leave it again."

Optimus didn't have to wait long before the cure was given to him. It was overnight that the leader went back to normal. Optimus woke up to the sight of his lost one. It was great to know it wasn't just a dream. Knock Out swayed his hips a little as he worked. The Prime smiled, just staring at the red mech standing above him and writing down things on a data pad. He turned to his patient, sensing he was awake.

"Good to see you awake," Knock Out smirked. "How you feeling?"

"I am doing better," Optimus replied back. Knock Out sat down next to him on the berth. "Thank you for coming back to me, and saving my life."

"Missed you so much Sweet Rims. Bumblebee is wonderful. He's everything I imagined in a son," Knock Out commented. "The others found a crashed pod and went to investigate. They should be arriving soon."

"Then I want to catch up with you. It's been so long," Optimus whispered huskily.

"I suggest we take this somewhere else then. I don't mind getting caught but I believe it will ruin your image as Prime," Knock Out purred. "I'm sure you yearn to feel me through the bond again, know what I'm thinking and feeling. Have our sons know I'm there too."

~~~000

"Knock Out probably took him to his room to rest. They haven't seen each other for vorns. I'm sure they want to renew their bond," said Breakdown.

"Guess you have to wait Smokey," Bumblebee teased. "I'll fill you in on what happened."

"But I wanted to see carrier when I came," Smokescreen whined. "It's been, like, forever since I saw him last."

"Be patient young one. Optimus is recovering from Cybonic Plague and needs time. He'll most likely go to recharge when they are done," said Ratchet.

Smokescreen pouted, not liking the idea of having to wait. It was hours until the bonded came out, Optimus looking very happy. Bumblebee nodded at his carrier. Smokescreen just ran up and hugged the larger mech.

"I missed you so much carrier. I came and they said that you were busy and I would have to wait. It was the longest time in my whole life of waiting," Smokescreen exaggerated.

"I missed you as well Smokescreen," said Optimus. "I want you to meet someone. This is Knock Out, your sire."

"But I was told sire was dead," Smokescreen denied.

"That was before. He lost his memories and recently gained them back," said Optimus.

"Smokescreen right? It's good to finally meet you," Knock Out said. He gasped when Smokescreen suddenly hugged him.

"Finally, I have a sire. I'll be the best son I can be," said Smokescreen.

"I know you will. Bumblebee is already a great kid," said Knock Out. He looked scared as something came to his mind. "Slag! Breakdown, Starscream is going to have our helms. We didn't return to treat Megatron."

"Oh scrap. How mad to you think he'll be?" Breakdown asked nervously.

"I don't want to find out. I don't like having my paint scratched," Knock Out shivered.

~~~000

"Starscream, where is Knock Out and Breakdown?" Megatron asked from the medical berth.

"They haven't returned yet," said Starscream.

"We must contact the Autobots. They must have captured them," Megatron ordered.

"Of course," Starscream bowed. He went to the computer and contacted the enemy side.

"What do you want?" It was Ratchet.

"It seems like two of my soldiers disappeared. You wouldn't have them, now would you?" Megatron asked.

"Nope. No sign of 'Cons here."

"Ratchet, don't lie. Yes Megatron, they are here. Knock Out saved my life from Cybonic Plague."

"Ah Orion, good to hear you again. I was needing to speak with you," Megatron said. "I want this war to end. We aren't getting anywhere with it. I'm tired of it."

"Do you wish to meet in person to discuss this? Or rather continue talking?"

"Either works for me. Search our brother bond. I am telling the truth. We can start fresh with a new home where everyone is equal," Megatron claimed.

"Very well. We can begin when I am fully recovered."

"Excellent. I will contact you again in an earth week or so," Megatron agreed.

~~~000

"This is nice," Knock Out commented. "Cybertron is back and it's just how Megatron said it would be. No more caste system and bounding rules."

"It is wonderful. We can live in peace and have a proper family," Optimus agreed.

"Bee and Smoke will soon have families of their own. I hear Bee is with that Arcee femme," Knock Out hinted.

"Then we will love their sparklings. It would be nice to have a new generation," Optimus sighed. "Come, it is getting late. We both have to work tomorrow. The humans are coming to visit again."

"Alright. But I want you first, then we can sleep," Knock Out demanded.

Optimus shivered and went to the berth. Knock Out stalked after him, keeping him pinned beneath his smaller frame.

"I love you Optimus Prime," Knock Out whispered into his audio receptor before licking it. Optimus shivered again and moaned.

"I love you too Knock Out," Optimus whispered back.