Hello friends! Welcome to chapter 3! This chapter explores Mon-El starting to adjust to life on earth 1, and Kara interacts with a new alien!

P.S. Thank you to all who took the time to comment on previous chapters, I appreciate you all so much!

Chapter 3:

He couldn't tell her.

Despite his exhaustion He'd laid awake for hours last night trying to figure out how to handle the situation, and he kept coming back to the same conclusion.

He couldn't tell her.

As he lay there in the bed in Barry and Iris guest room, Kara's face kept playing over and over in his mind. The same face that haunted him as he fled from the earths atmosphere and into outer space. That look that made him want to find his way back to her with nothing more than his bare hands – digging through the layers of their now separate worlds. But he couldn't.

What if there was no way to cure him of his lead "allergy?" There was no way he could give her – give himself – hope that he might be able to return just to rewrite heartbreak all over her beautiful face.

Mon-El sighed. The morning light was beginning to seep through the curtains of the window and he hadn't slept a wink yet. He hadn't slept without Kara next to him for months, and felt like he never would be able to again. Pulling the covers closer to his chin he turned to his side, determined to get at least a few minutes of sleep before the day started.

"Mon-El" a voice said, as a light knock came to his door. Mon-El flipped back onto his back exasperated. "We need to get to Star Labs here pretty soon."

"Great." He mumbled under his breath, before throwing the covers off the bed and sitting up.

"Yea,'know worries man, just give me a few minutes."

The door opened, and Barry popped his head in.

"Hey man, brought you some clothes. We can can pick up some stuff later today as well."

Mon-El stood, walking towards the speedster, already convinced any pants the flash owned would be way narrow for him.

"Thanks." He yawned, taking the clothes from him.

"Dude you look awful, how'd you sleep?"

"Didn't sleep a blink." He stated, remembering the catch phrase Kara had told him a few weeks ago.

"Uuuh Blink...? Dude its sleep a wink...at least on our earth" Barry responded getting more confused with each word he spoke.

"A wink...that also makes sense. Getting used to earth phrases is so weird. It could be wink."

"Right..." Barry trailed. "Wait! Dude you're an alien!"

"Um, yea..." Mon-El resounded, confused as to why Barry was suddenly acting like this was new information.

"Ok wait, so do you have powers like Kara then?"

"Uuuh yea, we'll no. I mean yeah I have powers, but not like Kara...sort of..."

Barry looked at him oddly.

"Kay...well get ready and we'll talk about this all later..." Barry said, suddenly realizing Mon-El was standing there in only boxers, before quickly ducking out the door.

Mon-El lifted up the red t-shirt, Barry had given him and slipped it over his head. The alien rolled his eyes – and then smiled upon realizing the t-shirt had the flash symbol on it. Of course. Kara always did the same thing.

FLASHBACK:

They were walking through the mall, Kara's hand gently gripping his own. Even after months on earth, he still wasn't quite used to how his eyes and ears would take in the sights and sounds on this earth. He smiled, looking at her.

"What?" She asked awkwardly catching his gaze.

"You're just pretty." He grinned even wider and she smiled back, meeting his eyes.

"Yea so are you." She jested, even though he knew she meant the compliment. Suddenly her eyes widened, and he followed her gaze to a window behind them.

"Mo-Mike look!" She exclaimed, pulling him towards a store window, her super-strength preventing him from doing anything but follow.

"Babe..." He tried weakly to resist as she dragged him into the store and towards a rack that had a bunch of Supergirl t-shirts.

"Babe." he repeated. "You really don't need any more Supergirl paraphernalia."

Kara mock dropped her jaw at him.

"Um, yes I do. I don't have any t-shirts, and neither do you!" She excitedly pushed a bunch of t-shirts into his arms.

"Okay, but if I wear a Supergirl t-shirt, does it stay Supergirl? Or does it become Super...boy?"

He protested as she excitedly pushed him towards the change rooms. "Or does it make it Superman...because considering the nature of our relationship that would be weird."

Kara pushed him past the sales associate, into an open change room. Mon-El looked over his shoulder upon hearing the sales associate tell them there was only one person per change room. The last thing he saw before Kara locked the door behind them was the concerned look on the employees face.

"Babe." He said short, trying to get her to stop and listen for a second. "You gotta calm down. We aren't both supposed to be in here."

"Wooow," Kara gawked at him. "Normally I get accused of being the goody goody in this relationship. Fine leave if you want to."

Mon-El turned to grab the lock of the door when Kara lifted her shirt over her head and innocently turned to pull the blue t-shirt off the hanger.

Mon-El groaned, immediately feeling his body respond to her. She who was so oblivious. Or was she, he wondered. Using his super speed, he came towards her, flipping her around and pressing her back firmly against the wall, firm enough that she could feel him pressing into her, but gentle enough that they didn't break the wall of the change room with their super strength.

"Mon-El..." She trailed, as he brought his lips mere millimetres from hers but refused to allow them to touch.

"What," He smiled cheekily, eyes dropping to her lips. "You didn't think you could drag me into a change room, literally take off your clothes and not have me want to touch you." His hands, which had found their way to her hips began to move their way up her sides, coming to her chest, which he grasped and massaged gently with his thumbs.

"Rao..." She gasped as she felt his lips drop to her shoulder, sprinkling kisses as he made his way to her neck, where he sucked gently. "...it's not what I'd intended..."

The way she spoke breathily, pressing her pelvis into him as she arched her back against him made

him want to take her right then and there. Instead however, he smiled again, breaking free from the grasp she had formed around his shoulders.

"Oh alright." He said, turning to pull off his t-shirt and replace it with the Supergirl one she had chosen for him. Kara stood gaping at him, grasping the wall on either side of her, panting heavily with eyes wide and dark.

"Well what do you think?" He asked smoothing the t-shirt over his chest.

"I..." Kara trailed, unable to take her eyes off him. "...think we should go home."

"I meant about the t-shirt. Do you like it?" He asked, turning so she could examine it from every angle.

"It looks good." She all but squeaked.

"What about yours?"He asked, reaching for the t-shirt she still had bunched in her hand, and helping her bring the shirt over her head and arms. "What to you think?"

He was pressed against her again, this time allowing his lips to meet hers briefly before pulling away.

"I think..." She gasped as his grey eyes looked directly into her blue ones, fingers gently trailing up her biceps. "That you putting clothes on me is the opposite of what should be happening right now."

"Gods..."' He crashed his lips into hers roughly, unable to resist any longer. "Let's go home"

His arms came around her back, eventually finding the pockets of her jeans. Finding herself pressed against the wall again, she slipped her thigh between his legs, allowing friction to do its work. Eventually Kara nodded, slowing processing his words.

"Ok but not before we buy these awesome t-shirts." She said between kisses. Mon-El nodded against her and they both sprung into super speed to change into their original clothing, helping each other to look presentable before leaving the Change room.

"How'd they fit?" The sales clerk asked, pretending she hadn't heard the entire exchange between them, as Kara emerged from the change room, Mon-El closely following behind.

"Great!" Mon-El Laughed awkwardly, causing Kara to laugh along with him.

"We'd take them all if we could!" She contributed, trying to brush the awkwardness off with a wave of her hands.

The two shuffled past her, making the situation even more uncomfortable if possible. The sales associates cheeks flushed as they passed. Mon-El leaned over her shoulder as they walked, quietly whispering in her ear.

"You're gonna fly us home right?"

"Oh gods yes." She smiles, turning her head back over her shoulder so she could plant a kiss on his jaw.

END FLASHBACK.

Mon-El smiled sadly to himself, a mix of emotions twisting around inside him. No, he definitely couldn't knowingly make Kara feel what he was feeling right now.

XXX

"Well, your vitals all look good, it doesn't seem like the lead did any permanent damage to your system." Caitlin smiled at Mon-El, who was sitting on doctors bench in Star Labs.

"Great!" He grinned, clasping his hands together enthusiastically. "When do we start working on my cure to get me home?"

"Well, I already have a few ideas, but it will take a couple of days to make serums, and then even longer to test things out. But first, I'll need to draw some blood.

Caitlin tied a rubber band around Mon-El's elbow, before turning to grab a needle from the tray resting on the cart next to them.

"Oh that won't..." Mon-El began, as she tried to push the needle into his skin, causing it to snap at contact. "...work."

Caitlin looked down as the tip of the needle bounced to the ground, rolling under the bench he was sitting on.

"Hmmm...ok then...maybe let's start with some saliva, while we figure out how to take some blood." She asked grabbing a cotton swab. "You do have saliva right?"

Mon-El smiled and laughed, nodding. "Yea I do. On my Earth we use a needle made of lead for me, of course, that only works until we cure my lead allergy."

Caitlin purses her brow thoughtfully. The room was silent for a few minutes, and Mon-El eventually took the silence as a moment to reveal the revelation he'd had overnight.

"So, I was uh, thinking, about how we, I mean you, were going to go back to my earth and tell Kara where I am, and I'm not sure that's a good idea."

"Why?" Barry asked with a tilt of the head.

"Well it's just, we don't know how this cure thing is going to go," Caitlin approached Mon-El with the cotton swab, and he opened his mouth allowing her to take his DNA before continuing on. "It's just that I don't want to give her hope, and then just crush her all over again."

Barry reached back, brushing the back of his head with his hand.

"I don't know man, I mean if Iris were sent to some random planet, and someone was able to come and tell me that she was ok, even if I'd never get to see her again, I'd want to know. Besides, Kara comes to this earth sometimes, wouldn't it be better to give her a heads up instead of just have her show up in a few months only to feel like we were hiding this from her?"

Mon-El was silent for a moment, processing what the speedster said.

"You didn't see her when I left..." Mon-El signed, "I'm not opposed to telling her, I just...don't want to give her false hope. What if we give it a few weeks, to see where Caitlin is with the cure, and then tell her once we know the chances? Does that give you enough time to get an idea Caitlin?"

"Well, it's not a lot of time, but I've worked with much shorter deadlines before."

"Alright, and if in a few weeks we still don't really know, we'll just have to tell her I'm here..."

"Ok, sure man, but let's not wait to long." Mon-El nodded and Barry continued."So Mon-El, these powers of yours, can we test them out today?"

Mon-El smiled.

EARTH 38

Kara sat curled up on Alex' couch, her favourite episode of Orphan Black moving along the screen of the TV. She sighed adjusting herself, wondering how on earth her sister was ever able to get comfortable on the thing.

She was just reaching back to adjust the pillows behind her back when the door to the apartment opened.

"You know Alex, have you ever considered the possibility that couches are actually supposed to make you feel better, rather than like there's a board attached to your spine."

Alex laughed as she closed the door behind her. "You know Kara, I am one of the few people on this planet that actually knows you can't feel pain right?"

"Pain no, discomfort yes." Kara complained shifting again. "You know there's this planet called Zamtubia near Krypton, that the people are like...made of this weird cushion like material...and they are like the opposite of us. They need to sit on hard surfaces in order to be comfortable, so all the furniture on their planet is literally made is stones. And let me tell you, I've sat on couches on their planet that are more comfortable than this."

Alex chuckled again rolling her eyes, placing a box of doughnuts in front of her little sister. "Well, I guess if we ever meet any refugees from Zamtubia, we'll just have to donate it to their cause."

Kara laughed, reaching forward and pulling a couple of doughnuts from the box. "God you're not even trying to argue, that's how bad it is."

"Yea..." Alex exhaled, "Maggie's been nagging me about it for months. She's at the point where she refuses to cuddle here anymore. I really need to do something about it."

"So why haven't you...?"

"It's just...so big...and heavy. And it was so hard to get in here."

Kara stared at her deadpanned, as Alex took a bite of a doughnut.

"You realize that I have literally superpowers right? I'll fly the thing out of here right now. Ooo! Or break it! Or! I could set in on fire, and we could just watch it burn."

"Hmm, maybe." Alex said sigh a casual shrug of her shoulders, the mockery hidden beneath the subtle movement. Kara was about to answer when Alex' phone started to ring on the table in front of them.

"It's Maggie." Alex bent forward, picking it up. "Hey babe."

"Alex." Maggie's hushed voice came through the ear piece, causing Alex to stand up and Kara's attention to drift towards the pastry in her hand.

"Hey what's up, are you ok?"

"Where's Supergirl?" She breathed through the sound of gunshots and screaming that surrounded her.

"There's this weird bird looking alien thing terrorizing down town."

Kara's back stiffed, having heard what the cop said with her super hearing, and exchanged a glance with Alex. Alex looked at the blonde concerned, it had only been a couple of days since the Daxamite invasion and was sure Kara wasn't ready for super heroing quite yet. Despite this, Kara nodded disappearing for a second before returning in her super suit.

"We're on our way." Alex said, hanging up the phone as Kara grabbed her and jumped out Alex' open window.

XXX

Supergirl and Alex landed right in the middle of the chaos, Maggie turning and smiling in relief when she saw them. The beast stood about 10 feet high, and had a black armoured exoskeleton running all over his body. Broad winds hung off his shoulders, and his face occupied a large yellow beak. Those were the only qualities that made him bird-like though. He stood tall and strong with the build of a soldier. The police had stopped firing bullets at him, after two had deflected off his exoskeleton and injured two civilians.

"Ah! Supergirl!" a wicked smiled carved itself into the mouth that resided beneath his beak. "Good you're here, time for the real fun to begin."

He bellowed in a laughter that echoed through the skyscrapers of the city. The alien took a massive step forward before breathing fire through the nostrils of his break. Kara jumped in front of everyone, a giant exhale of freeze breath distinguishing the fire immediately. He laughed again.

"Do you know how many galaxies I have searched to find the last daughter of Krypton?" With a scream, he thrust his arm forward into a nearby building, smashing the wall to pieces as he hit it. Wood and rubble went flying, and the onlooking pedestrians scattered in horror at the oncoming debris. Kara leapt into flight, grabbing a woman in her arms, shielding her from a piece of rock that was about to crush her. The alien flew, quickly setting her behind the police barrier.

"Take this guy out now Supergirl." Maggie said, but Kara was already ahead of her. Supergirl charged at him, ready to throw him back with her super strength. Despite her speed, the monster seemed to slow down time. His hand started to glow bright purple and he threw his arm back before connecting his fist right into her face. Kara was thrown back into the building, which shattered on impact as she rolled to the ground.

"Supergirl!" Alex yelled moving to run towards her sister.

"Stay back!" Kara yelled picking herself off the ground before bolting in front of the police barrier. The creature was bellowing laughter again; a character trait Kara was quickly getting tired of. Kara took his moment of distraction to hit him with her freeze breath. She was hoping that the metal like material of his skin would freeze, causing him retreat. The bird like alien started to scream in agony as his armour started to ice over, shards of ice slowly making their way to his flesh.

"Got ya." Kara smiled to herself.

"You haven't seen the last of me Kryptonian!"' He yelled, before cracking the ice around him and flying off into the sky. The crowd around her began to clap, but Kara felt herself sway, breath fluttering in her chest.

"Supergirl." Alex said, stepping forward and grasping her sister by the arm. The agent lowered her voice into a whisper, so only the blonde could hear. "Kara you're bleeding and bruising."

"What...?" Kara asked, lifting her hand to her cheek. Her eyes widened when she pulled her fingers back to reveal red drops of blood. "This doesn't make sense, my powers still work."

Alex nodded. "Meet me at the DEO."

Kara agreed, before leaping into the sky, leaving an awed crowd of people behind.

Earth 1:

His feet gripped the ground tightly, as he prepared his body to jump as far as he was physically able. The series of tests Cisco and Caitlin were doing on him reminded him of all the tests Winn had put him through when he first landed on earth.

The alien crouched slightly, before pushing himself forward, sending himself through the air, over and across the building and onto his two feet on the other side. The Flash team let out cheers of excitement, and Mon-El chuckled to himself wondering what their reaction would be when they saw him leap over a skyscraper for the first time.

"Dude! That was awesome!" Cisco yelled as he walked back around the building. "How much effort do you think you were exerting there?"

"About 20% or so, Id say."

Cisco lifted his hands to his head, and brought them out in a "mind blown" motion.

"Okay," the tech exclaimed excitedly, "this next one, I think you'll be excited about." Cisco reached into his pocket and pulled out a small remote, which he pressed to open the door to the warehouse."

Mon-El grinned back at Barry as they walked into the warehouse. He had casually mentioned earlier that he and Kara liked to use cars as punching bags, and now there was one hanging in front of him.

"Dude, is that Ezmerelda?" Barry asked. Mom-El looked confused.

"Yea," Cisco turned to Mon-El explaining. "She was my sweet ride, but stopped running a few months ago. Time to get some revenge."

Mon-El looked at Cisco strangely, the man becoming more odd to him by the moment. The alien stepped forward, raising his fists in front of his face, before releasing a series of punches against the vehicle. The vehicle swung back and forth, when Cisco let out an awed "dude..." as he looked at the numbers on his tablet.

Mon-El was about to release another set of punches, when an alarm echoed through the building. He jumped back instinctively feeling like he had somehow caused the sirens.

"That's our alert system." Caitlin explained, "but I have no idea why Cisco has it so loud."

Cisco smiled sheepishly, bringing up the alert on his tablet.

"Looks like we've got an incident at Jitters."

"What kind of incident?" Barry asked, looking over Cisco's shoulder. "Meta-human or otherwise?"

"It doesn't say much...just that an unknown creature is threatening public safety..."

"You want to come along?" Barry asked Mon-El, already convinced his powers would help in any hostile situation.

"Yes sure!" Mon-El was eager to help, determined to keep the promises he'd made to Kara as they'd departed.

"Think you can keep up?" Barry asked smiling coyly. Mon-El smiled back.

"Guess we'll see." The two men disappeared in a blur and Cisco gasped in awe, not having seen Mon-El's speed yet. Caitlin rolled her eyes and laughed.

"Oh come on that's cool!" He protested but she just looked at him. "Oh you know what, I miss HR. He needs to get back from his earth soon. He'd appreciate this."

"I do appreciate it, I just don't need to fan girl over him."

Cisco rolled his eyes and was about to protest when his tablet made another noise.

"Oh! We've got a description of the culprit. The intruder is about 10', black exoskeleton, wings and a yellow beak. It also breaths fire."

A/N: Thank you all so much for reading, please take a moment to leave me your thoughts!