Disclaimer: I do not own Supergirl or the characters.

As dust rained down on the occupants of the disused and now destroyed lab Henshaw demanded.

"Danvers, you okay?"

"I think so." Alex said coughing up dust as she climbed to her feet. "Ah crap."

"What's wrong?" Henshaw asked moving over.

"Nothing, I just cut my hand on something." She explained as she looked around for an exit.

"Is it bad?"

"Don't think so. Any idea what happened?"

"Looks like the place was rigged to blow. What I can't work out is if we were meant to be killed or our presence was a coincidence." Henshaw replied making his way to Alex's side. "With any luck the rescue party will be here soon and we can start digging for answers."

As if on cue a blinding light appeared on the far side of the lab, accompanied by a loud rumbling as Supergirl moved the debris and created an opening.

"Are you two okay?" She asked, immediately looking at Alex.

"We're fine." Henshaw said moving to the opening. Seeing her sister's bloodied hand Supergirl asked.

"You sure you're okay?"

"I'm fine." Alex said, snapping slightly.

"To be on the safe side go back to HQ and get that cleaned up. I'll handle things here." Henshaw said.

"But-"

"No buts. Move it." Henshaw ordered. Reluctantly Alex moved to one of the SUVs as Henshaw looked at Supergirl. "I could use your help, carefully, clearing the debris."

"You got it."

-00-

That afternoon Supergirl entered one of the labs where Alex was head down over a laptop.

"How's the hand?"

"It's fine." Alex said dismissively.

"That's good. You want to get some dinner?"

"I'm working."

"You sure you're okay? You seem a little different." Supergirl asked.

"I'm fine." Alex said sitting up. "Actually, you know what I need to unleash some frustration. You want to train?"

"Not what I had in mind. But sure."

"Let's go then." Alex said immediately standing and walking out of the lab.

"You sure you're okay?" Supergirl asked chasing after Alex confused by her abrupt behaviour.

"I won't be if you ask me that again." Alex shot back as she entered the training room.

As Kara entered the training room she didn't notice what setting Alex had set the room to, but she immediately knew something was wrong as she started to feel weak.

"I think there may be something wrong with that dial." Kara said, suddenly feeling dizzy.

"No there isn't." Alex said. "It is exactly where I want it to be. You have been reduced to less than five percent."

"I don't understand." Supergirl said.

"Since day one you have ruined my life. That ends today." Alex said as she hit Sueprgirl, sending the powerless hero flying.

"Alex, what are you doing?"

"What I should have done along time ago." She said walking up to Supergirl and unleashing a kick to the ribs.

"Why are you doing this?" Supergirl asked as she clutched her ribs in pain.

"Because I hate you. You took everything from me. My life, my parents' love and my father's life. He would be alive it weren't for you." Alex spat kicking the fallen hero again.

-00-

"Alex, that's enough." Henshaw said grabbing hold of the elder sister surprised with how much strength he needed to hold her still. What surprised him more though was the strange movement he saw under her skin in her neck. Deciding to waste no further time he tranquillised her before ordering a team to take her to the observation lab.

Happy she was contained he approached Supergirl and breathed a sigh of relief when he confirmed she was still alive. Beaten and broken, but alive. When he had entered the room and seen the onslaught he had not been confident that would be the case.

For a moment he considered his options. He had deactivated the Kryptonite as soon as he entered, but Supergirl's wounds were not healing. He was torn between leaving her where she was so he did not injure her further and hope her strength would come back; and taking her to her recovery room to use the artificial sun light to heal her.

"Can you hear me?" He asked as he gently nudged her shoulder. Getting no reply he scooped her up in his arms and carried her to the recovery chamber.

-00-

"Don't move too fast." Henshaw warned when he saw Supergirl start to stir a day later.

"What happened?" She asked groggily, trying to remember why she was in the recovery chamber.

"What do you remember?" Henshaw asked carefully.

"Training with Alex." She said before memories started to flood back. Sitting up much to Henshaw's annoyance she added. "Alex tried to kill me."

"Not exactly." Henshaw said moving round so he could look Supergirl in the eyes.

"Your sister was taken over by some sort of parasite. The parasite seemed to unleash anger. We are still not sure where it came from or how it interacts with the human brain, but what we do know is that Alex was not in control. It may have been her body in that training room, but it wasn't her."

"Is it out of her now?" Supergirl asked.

"It is. You can see her, but she is sedated. It was a complex operation and she will be under for sometime whilst we let her recover. But you are welcome to sit with her." Noticing that Supergirl did not immediately respond he said. "You will be safe. It is out of her now."

"That anger, what she said, it still came from Alex. I never thought she felt any of those things." Supergirl said looking despondent.

"Tell me something," Henshaw started. "In all the years you were growing up with the Danvers, did you ever, even if it was just for a split second, feel resentment towards Alex because she still had parents and a world?"

"I guess." Supergirl said. "But neve-" She tried to say only for Henshaw to raise a hand to silence her.

"We all do. It is natural. Those feelings of anger, resentment, jealously are with us all. But we control them. They make up such a small part of who we are they don't matter. All the parasite did was let those fleeting feelings take over. I know it is hard to understand what happened, that you have been through something terrible, but right now I need you to get over it."

"Has something happened?" Supergirl asked.

"Not yet. But it will."

"What do you mean?"

"When Alex wakes up she will remember what happened. I have never seen a sister love a sibling as much as she loves you. Every decision she has made has been to protect you, often to the detriment of her own life. When she remembers what she did it is going to hit her hard. She is going to need you to get over this." Seeing the doubt and fear in Supergirl's eyes he went on. "The only way Alex will get over this is for you to forgive her and help her through it. Are you willing to put your fears to one side and help your sister as she has helped you on so many occasions?"

TBC