Sunstreaker returned the soft kiss, his body shaking as his brother caressed his most sensitive part, grinding his hips down against his brother's exposed panel. He heard his twin gasping into the kiss, and he moved again, his own panel clicking open as well. His spike extended outwards, brushing against Sideswipe's bared valve and said twin moaned, his whole body trembling. Sideswipe's hands dug into his brother's side seams, his fingers caressing the delicate wires beneath, and grinning as his brother offlined his optics and moaned loudly. "Sideswipe..." Sunstreaker moaned, finally onlining his optics again and locking gazes with his twin, angling his hips upwards and pressing his spike against Sideswipe's valve, before slowly, teasingly pushing himself in. Sideswipe's grip on his armor tightened as he was filled, gasping and throwing his head back against the berth. Sunstreaker pushed himself all the way in, waiting a moment for his brother's body to adjust. He then set a slow, steady pace, thrusting into his brother as the latter caught his lips in a kiss just as slow and teasing as their pace was.
It was perfect, their bodies rocking together and teasing sensor nodes that had never before been touched, both twins panting and gasping and lost in one another. Sunstreaker quickened his pace, thrusting faster and harder into Sideswipe as his brother clung to him, trying to get more of his twin. He kept going faster and faster until his brother finally stiffened and let out a loud cry, overload tearing through him and setting his circuits ablaze. He lasted a few more seconds before his own overload reached him, pushing him over the edge and he fell, moaning his brother's name as the pleasure raced through his every wire.
Sideswipe grunted as Sunstreaker's pulled out from him, barely holding back a soft moan at the over sensitized nodes being teased again. Onlining his optics he hesitantly looked up at his brother's face, afraid of seeing Sunstreaker's face twisted with regret over what they had done. Instead he found himself staring at his brother's relaxed and heated gaze, and he sheepishly smiled up at him, his timid smile turning into a full grin when Sunstreaker smiled back at him. Not trusting himself to speak he merely leaned up and pressed another kiss to his brother's lip-plates, before Sunstreaker climbed off him and laid on his side next to him, wrapping his arm around his brother's waist and pulling him closer to his own frame. Sideswipe turned to lay on his side as well, still grinning as his arms slid around his Sunstreaker's body, moving as close as it was physically possible. Lying like that and staring at one another in silence, they both drifted into recharge, exhaustion from both high grade and their activities finally taking it's toll on them.
Morning found them in that same position. Sideswipe was the first to online, his processor aching due to the high amount of high grade he had consumed the previous day. Onlining his optics he looked ahead of him, and his optics locked on his twin's form, who was slowly awakening. How odd. It had been ages since they had shared a berth, and he certainly didn't remember them sleeping so close to one another, to the point where their bodies were a tangled mess of legs and arms... And then it hit him, the memory of the previous night coming back to him and his optics widened, staring at his brother's beautiful face.
Slag.
Sunstreaker was finally stirring from recharge, but instead of onlining his optics, he merely tightened his grip around his brother's body and pulled him closer, burying his face in his brother's chest. Sideswipe smiled at that, letting a soft sigh escape his lip-plates as he thought that maybe things wouldn't be that bad... Maybe they could work this out together, whatever "this" was. In the meantime, he was gladly pulling Sunstreaker closer to him, before he moved his helm to whisper in his brother's audio receptor.
"Morning Sunshine.. sleep well?" His voice was soft and low, and it sent a shiver down Sunstreaker's back. Pressing himself closer to Sideswipe, he mumbled a barely audible "Don't call me that," before he finally lifted his helm to look at his brother's optics. "Sides, I-" He was beggining to say, before Sideswipe cut him off. "Shh, don't say anything. Let's just not say anything now. I wanna enjoy this before we gotta get our afts back to duty." Sunstreaker chuckled at that, and leaned up to press a kiss to his brother's lip-plates, before sitting up on the berth and stretching his stiff body. And then he looked down at himself, frowning deeply at the state of his beloved paintjob.
"Slaggit! Look at this!" He groaned, pointing at his yellow -and now also red- armor. Sideswipe couldn't hold back the chuckle that escaped him, and after receiving Sunstreaker's sullen glare he sat up as well, running a hand through his chassis, fingers tracing the red scuffs across the yellow paint. Sunstreaker shivered, but said nothing as his brother spoke. "I'll help you repaint yourself, but we gotta do it now. We can't let the others see..." His voice trailed off and he frowned at the thought of what their fellow 'bots would say if they saw them right now. Even a dinobot would know what they had done. And they couldn't afford that. Sensing his brother's uneasiness he leaned forward, face only a breath away from Sideswipe as if he were about to kiss him. Just as Sideswipe was about to close the gap between them and press their lip-plates together he smirked and shoved his brother away, throwing him off the berth. Sideswipe landed on the floor with an indignant yelp, glaring up at his twin, who was now grinning down at him. "C'mon, let's hit the wash-racks." The golden mech said, pushing himself to his feet and offering his twin a hand to help him up. Smiling, Sideswipe took it, but instead of letting go after he was on his feet he pulled from it, dragging his brother close and now really pressing a kiss to his lip-plates. "Okay. Tease." With that said they both made their way towards their private wash-racks, where cleaning themselves off resulted in both twins panting and moaning after another powerful overload.
Yeah, right now, neither of them was thinking about the terrible reality that they were brothers. Twin brothers. It just felt too damn good to stop.