Super cold air whipped around, pulling every ounce of warmth from the room Caitlin Snow stood in. Hungrily she fed on the sweltering heat, drawing it down and into her skin. Just as fast as the banks of heat lamps could pump out energy, Caitlin gobbled it up. It was the only safe way Killer Frost and Caitlin could feed their powers. In the past they would pull the energy from the people around them a little at a time, but ever since Cisco found that out, he went out of his way to build her a room that would charge her battery safely. It was ecstasy feeling the heat seep into her, making her giddy with power. Laughing the woman spun, arms outstretched.

"Feel good Caitlin?" Cisco's voice drifted over the intercom.

"This is fantastic Cisco!" Both women spoke together, voices blended. "It's even better than when I tried to cool down that little bomb last year."

"That 'little bomb' was big enough to wipe Central City off the map if it had gone off." Iris stated in her clipped tone that she liked to use for anyone who wasn't Barry. Caitlin rolled her eyes.

"It's a good things Dad was there, wasn't it?" Nora commented. Caitlin nodded, even though she knew that no one could see her.

"Hey Cisco, you wanna turn this off?" Caitlin called. "Killer Frost and I are fully charged."

The lights shut off, still glowing hot from pumping out so much power. The heat seal on the door hissed as it released and the door opened, showing Barry and Cisco waiting on the other side. The others were in the cortex, waiting for them. With a small smile Caitlin joined them, all three of them walking back to the heart of the complex.

"How does it feel to be fully charged?" Cisco asked eagerly, tablet in his hand.

"Like I'm unstoppable and bulletproof." Killer Frost echoed in Caitlin's voice, the two of them slowly integrating into one personality. "It makes me want to see just exactly what I can do. The only time we felt this in control and powerful was when we were with Savitar."

"Tell me about it. You were ruthless back then." Barry shook his head. "My leg still twinges when it gets cold."

Caitlin cringed at that, feeling bad that she had hurt one of her very best friends. At the same time though, she couldn't really bring herself to care. Barry was reckless and didn't think oftentimes. Suffering an injury was something that he needed to deal with. Especially since his powers usually heal everything back to 100%. Killer Frost was influencing her more and more every day.

"Sorry Barry." Caitlin frowned, automatically apologizing. "My memories from that time are fuzzy. I was fighting to break through, but Killer Frost was stronger than me at the time."

"Don't worry about it." Barry shrugged. "Since you fed today, how about in the morning you and I go head to head to gauge how well you handle your powers?"

"We can go now if you want, I'm antsy for a fight." Killer Frost purred, Caitlin sharing her consciousness with the other personality. It was odd when they swapped point of views, like Caitlin could see and hear what was going on, but couldn't say anything.

"I would, but Iris has booked us reservations for our anniversary." Barry stuffed his hands into his pockets as they rounded the corner into the cortex. There was a suit bag thrown over the back of one of the chairs. Iris was dressed in a flashy red dress, hair done up and makeup on a bit heavier than normal.

"And Barry needs to change if we are going to make it on time." Iris picked up her clutch purse, opening it to make sure the contents were all there.

Even in her suit Caitlin felt frumpy around Iris. The woman just had a way of making Caitlin insecure about herself. Any time she wasn't around Barry's wife, she had no problem holding her own. The one thing that made her feel better was the fact that Iris was powerless, just a normal human. Whereas Caitlin and Killer Frost were a literal goddess, her powers and identity having been taken from Greek mythology.

"Good luck with that." Cisco shook his head with a laugh as Barry grabbed his bag and zipped away to change.

"I've never figured out how Barry can have super speed and still be late to almost everything he has to go to." Caitlin shrugged, striding past Iris and heading to her lab. She wanted to get changed out of her suit, go home, and curl up in sweats before getting lost in Netflix.

"Caitlin, can I ask you a question?" Iris footsteps followed Caitlin to her lab, voice pitched quiet.

"Sure." Not really, but did she really have a choice.

"I know at some point in the future we have Nora, but during your research on Barry, did you ever happen to examine his, well, you know." Iris was blushing, and it took everything for Caitlin not to laugh.

"No, there has never been a reason to worry about reproduction. Why?" Just shoot me now, Killer Frost whispered in Caitlin's head.

"I was just wondering." The other woman shifted uncomfortably. "When we are together it's fantastic, but after I cramp so hard and ache worse than any period I've ever had."

"Does he use his speed with you? That could be dangerous if you don't have meta healing abilities." Caitlin was genuinely concerned, never having delved into this particular field of study regarding Barry.

"He tries not to, but sometimes he gets carried away." Iris looked pained to even be talking about this to Caitlin. As a doctor, Caitlin was concerned for Iris and Barry, but as a woman more than halfway in love with her husband, she wanted to drop the subject and never revisit it.

"If you can manage to get me a sample I can take a look, but other than that, I don't know what to tell you." The doctor shrugged as she stepped into a curtained off cubicle to change back into civilian clothes.

"Thanks Caitlin." Footsteps walked away and Caitlin let out a quiet sigh.

"You're not seriously going to run tests on Barry's -" Frost asked.

"I guess I am." Caitlin replied. "I've just been avoiding the subject."

"Too bad you won't have a practical base to go off of." Frost purred. "I sure do miss Savitar sometimes. He could make me melt with just a touch."

"As much as I am jealous of that, please keep those memories to yourself. I don't need that added to the rest of my penance." Caitlin huffed before going about her day, running all sorts of tests and experiments.

Each day brought Caitlin and Killer Frost closer. They shared almost everything, even their attraction to Barry Allen and their irritation at Iris West-Allen. More and more now they would find themselves wandering aimlessly through S.T.A.R., finding secluded places where she could sit and relax away from everyone. Eventually she would return to to cortex to find that no one missed her, or so she thought.

Caitlin was walking into the cortex through a side entrance when a voice stopped her.

"Decided to return to us after your solitude?" Sherloque asked quietly, swirling the tea in his cup slowly.

"Sometimes I just need to get away and have some quiet time." Caitlin shrugged walking further into the heart of their operations.

"It also must hurt watching them together."

That stopped her in her tracks. Blinking she turned to look at this version of Wells, face composed even though her heart raced. The two of them stared each other down, not realizing that everyone else in the room was watching them. Caitlin felt her eyes go blue and Killer Frost said very quietly,

"Leave that subject alone Wells and we won't hurt you. Mention it again and you will learn my bite is worse than my bark."

"You ok Aunt Caitlin?" Nora asked, breaking the tension. Caitlin blinked and Killer Frost faded away.

"Yes, I'm all good Nora." She turned on her heel and moved to settle down at her station, the younger girl wandering over to look over her shoulder. On the monitor was the video from a micro slide with her Caitlin's blood on it. Caitlin was charting the differences in her blood after every charging and trip out into the field, trying to map out how her powers worked exactly.

"What was Sherloque annoying you about?" The young woman asked before being distracted by what was on her monitor.

"Shway! Are those your cells?"

"They are. I'm studying my own physiology in order to learn more about how my powers work since I didn't get them from the particle accelerator explosion." Caitlin explained, pointing out specifics on her monitor to the young speedster.

"Cryogenics can be used in countless ways to treat all sorts of diseases and disorders, from slowing the effects to being able to isolate the malignancy and remove the sickness."

"This was your field of study before the particle accelerator blew, wasn't it?" Nora asked in fascination.

"Yes it was. I was a bio-engineer and geneticist. Seems like it was fate I was here when the accelerator blew and made your dad the Flash. Otherwise, I'm not sure how well he would have survived and learned about his powers." Caitlin nodded, surprised by how Nora was paying attention to her. Normally Caitlin was a background player, only being needed when someone was hurt. It was nice to have someone to talk to.

"Caitlin's right." Barry added from across the room. "If I hadn't been helped by her and Cisco, and even Thawne as Wells, I don't know what I would have done."

"Well, we don't have to wonder, now do we?" Iris interjected, wanting the attention back on her, or at least away from Caitlin.

It was a disturbing pattern that the ice meta had observed over the last year and a half of Iris being 'team leader'. Every time the conversation included Caitlin, or had anything to do with Caitlin, the other woman would steer that attention back in her direction, effectively dismissing Caitlin. It made her blood boil, but there was nothing she could do about it. Caitlin took a deep breath and let the moment pass, but not before Nora's sharp eyes picked up on the tension.

"Nope." Cisco answered chewing on a Twizzler. "Team Flash saves the day, every day. Now that we have Frost on our side too we've got an even better arsenal of powers that we can use."

"Not to mention your inflated ego." Caitlin teased with a gentle laugh.

"Sherloque is the one with the inflated ego." Cisco defended. "I am simply confident in my abilities."

"It doesn't matter who had the ego, as long as we all work together to get things done." Iris huffed, not seeing how Cisco, Caitlin and Ralph all rolled their eyes. Sherloque did though and ended up snorting into his tea.

"I'm hungry." Nora popped up suddenly. "Who wants Big Belly?"

"You're always hungry." Iris complained. "If it wasn't for us having the money from Wells and S.T.A.R. I would have no idea how to feed you."

"Relax Iris." Barry laughed. "We would figure something out. I doubt Caitlin would let me starve to death."

"Nope. There are dozens of ways to keep Barry and Nora fed, and we've only tried a few up to now." Caitlin sent a smug smirk to Iris, glad to have the upper hand. After all, she was Barry's doctor and knew more about his physiology than anyone else.

"Race ya!" Nora shouted before taking off, her father taking off right after her.

"What am I going to do with the two of them?" Iris asked, but no one bothered to answer her.