Title: Sweet Child of Mine

Author: Leslie

Pairing: Sunstreaker/Sideswipe, mentions of Prowl/Jazz and Bluestreak/Smokescreen

Rating: R

Warnings: Heh… robosex… au…

Disclaimer: Not mine, well, except for the OC that'll be introduced later on. Everything else belongs to Hasbro or Michael Bay.

Summary: They hadn't planned on it happening… by all accounts it shouldn't have been possible, but the small spark in his black hands told them that the impossible had just happened.

Sunstreaker had been gone for six months… six long months in which Sideswipe had been alone at the Autobot base. Well, not really alone but without his twin, he might as well have been. Sunstreaker had been sent out along with the newly re-instated Jazz, and the newly arrived Wheeljack, Red Alert, Bluestreak and Smokescreen to Athens, Greece on a mission to stop Decepticon forces from setting up a new base and harming more innocent humans.

Today, though… today Sunstreaker would be returning and Sideswipe had spent all morning waiting for him. Prowl was pacing just outside the entrance of the base and Sideswipe smiled. Prowl had been deprived of his own bondmate for six months and Sideswipe knew the sub commander would be happy to have Jazz back home once again. Sideswipe looked out past the older mech and saw a cloud of dust approaching. He grinned and walked outside. Prowl turned to see him and smiled as well.

"Guess the wait's over, eh Prowl?" Sideswipe said to him. Prowl nodded and turned back to watch the others return.

"Don't get into any trouble tonight," Prowl told him after a moment of silence. "I'd like to enjoy my down time if you don't mind." Sideswipe chuckled softly.

"No trouble. You have my word." Prowl nodded.

"Good." The vehicles grew closer and the two could hear the roar of the engines as they approached. The vehicles came to a stop, the Autobot's returning to protoform. Prowl watched Jazz walk towards him and grinned at his bondmate. Jazz returned the smile and hugged the sub commander tightly.

"Welcome home," Prowl said quietly.

"Glad to be back," Jazz answered him softly before pulling back to look at him. "Missed you…"

Nearby, Sunstreaker had walked to his brother and Sideswipe held on to him tightly. Sunstreaker slid hands along his twin's back.

"Don't leave me like that again," Sideswipe whispered softly. Sunstreaker nodded and kissed the side of his face.

"Promise," Sunstreaker whispered softly even as one hand slipped between Sideswipe's back panels and brushed against the wiring there. Sideswipe shuddered and stepped back, looking up at his twin intently.

"Do you need to do anything else?" he asked quietly. Sunstreaker shook his head.

"Nope… just be with you…" Sideswipe barely let him finish before he dragged Sunstreaker into the base. Prowl and Jazz both chuckled, watching them leave before Red Alert's softly spoken comments reached both their ears.

"…is just wrong. They're siblings…" Prowl's gaze narrowed slightly. No one had ever before spoken out against the bond the twins' shared and Prowl wasn't about to let it start happening now. Bluestreak apparently heard the comment as well and turned to Red Alert.

"Siblings or not, they're bonded, Red. There's nothing wrong with it." Red Alert looked at him and slowly shook his head.

"It's completely wrong…" he trailed off and walked away leaving Bluestreak completely dumbstruck for the moment. Prowl and Jazz walked over to the younger mech and Prowl dropped a hand on his shoulder.

"Keep an eye on them tonight, would you?" Bluestreak nodded. His room was right next to the twins. He knew he would be getting any sleep that night anyway. "Thanks." Prowl turned and pulled Jazz off with him. Bluestreak turned as Smokescreen came closer to him, dropping an arm over the younger mech's shoulders.

"Want some company while you're twin-sitting?" Bluestreak chuckled softly.

"Sure…"

Sideswipe had dragged Sunstreaker back to their room and had quickly pushed him inside and locked the door behind them. He pushed his twin back to their recharge bunk and Sunstreaker grabbed him, pulling him closer, fingers slipping beneath his twin's side plates, brushing and tugging at wires there. Sideswipe groaned softly, returning the touches just as intently. He pushed Sunstreaker down on the bunk sliding into his twin's lap as he did so. One of Sunstreaker's hands slid down, slipping into the juncture between his twin's hip and waist, brushing there gently, causing Sideswipe to shudder almost violently.

"Stop teasing me, damnit," Sideswipe growled out softly. Sunstreaker reached up and slipped his fingers against the switch to release Sideswipe's chest plates. Sideswipe did the same to Sunstreaker. Both sets of chest plates opened as did the locks on the casing that protected their sparks. Sideswipe brushed his finger tips along the outer rim of the casing and Sunstreaker whimpered, his own fingers doing the same.

Finally, Sunstreaker grabbed Sideswipe by the arms and pulled him forward, pressing their sparks together, their systems merging almost violently. They both cried out at the intensity of the interfacing, hands gripping tightly, bodies shuddering harshly. Sideswipe felt his systems start to go offline and then violently recharge. Sunstreaker screamed, his spark felt like it was being ripped apart. Sideswipe felt the same way, but he couldn't scream so his hands tightened against Sunstreaker again. A moment later, both twins went offline…

Sunstreaker was the first to come back online. The room was dark and he had no idea how much time had passed. He could barely move. They were both lying on the floor. He shifted and felt something in his hand. His optics brightened and he turned his head since he wasn't able to move his arms just yet…

For a moment, he was speechless as he looked at his hand. He felt Sideswipe shift behind him and then heard the intake gasp that came from his twin.

"Is that…" Sideswipe whispered softly.

"Uhm… yeah… it is," Sunstreaker answered quietly.

"How…"

"I don't know…"

"Did we…"

"Yes… we did."

"Sunny… what the hell are we gonna do?"

"I don't know… but we need Ratchet… and we need to get to him now…"

Ratchet sat at his desk going through data pads he had not yet reviewed for the day. Luckily the team that had been gone for six months had returned with no injuries meaning Ratchet wasn't busy saving lives at the moment. It was nice… the peace and quiet…

And then the door to the infirmary opened…

"If you're not dying or bleeding out energon, then go away."

"Ratchet…" Ratchet would have yelled again, but he turned and saw the twins standing in his doorway. "Ratchet please," Sunstreaker whispered softly. "You have to help us." Ratchet was immediately on his feet. The fear in the yellow twin's voice had spurred him into action.

"What is it? What's happened?" Sideswipe came in behind his twin and Ratchet noticed that Sunstreaker's hands were closed over each other and there was something emitting light from inside his clasped hands. "Sunny?"

"Sunny, you gotta show him. He's gonna help us." Sunstreaker slowly opened his hands and Ratchet took a step back in shock.

"Where…"

"It's ours," Sideswipe said quietly. Ratchet looked at him, gaze narrowing slightly.

"How?" Sunstreaker shook his head.

"We don't know. We were hoping you could tell us." Ratchet looked back at Sunstreaker and at his hands then turned and walked over to a small cabinet. Opening the cabinet, he pulled out a spark casing and walked over to the twins. Sunstreaker looked at him fearfully and Ratchet reached out, resting a hand on the yellow twin's shoulder.

"It's okay, Sunny. It'll protect it…"

"Her…" Sideswipe whispered softly.

"Excuse me?" Ratchet asked, looking at Sideswipe again.

"Her," Sideswipe whispered.

"Okay," Ratchet said calmly as he turned back to Sunstreaker. "This will protect her until such a time as we can build her a protoform. I promise. She'll be safe." Sunstreaker nodded slowly and gently placed the small, pulsing blue spark into the gold casing that Ratchet had produced. Ratchet smiled at him gently and placed the casing on the exam table then turned and led both twins to another exam area.

"Have a seat and let's see what I can find." He opened Sunstreaker's chest plates slowly and opened the locks on his casing, opening it, checking the spark inside. He scanned it, took readings and then closed it once more. He turned to Sideswipe and did the same before he moved to the monitors and began to look through the scan results.

The twins watched him quietly, Sideswipe moving closer to Sunstreaker, holding his hand tightly as he did so. Sunstreaker leaned against him, but his gaze was on that gold casing that held the small spark inside of it.

After a few minutes, Ratchet turned back and walked over to them.

"So… it looks like pieces from each of your sparks merged and formed this small spark that is, in essence, your child, your offspring. It's… impossible… it shouldn't have happened, but, it did, it has. And, even more interesting is the fact that you sparked a femme."

"Is she going to be okay?" Sunstreaker asked quietly. Ratchet nodded slowly.

"She should be just fine," he told the yellow twin, resting a hand on his shoulder. "I need to call Prime, though. Are you okay with that?" The twins nodded slowly. "Good." He turned towards the comm box then turned back. "What are you going to name her?" The twins looked at each other then back at the casing box.

"Stormfire," Sunstreaker whispered softly…

TBC… please read and review. Thanks!