(Wow so many follows and favourites, thanks a lot everyone! Here is Chapter 4... enjoy :3 )

Chapter 4

Shifting uncomfortable on my feet I anxiously opened the door a crack. I peered out into the room where they were waiting. Natasha, Pepper, Agent Maria Hill and Jane were waiting for me. At this point I had been properly introduced to Pepper Potts and Jane Foster. I must admit they were very admirable, Pepper for putting up with Tony and Jane for her determination with her research. I could see us getting along fine. Well explaining why I was peering anxiously, Natasha had lent me one of her 'undercover' dresses for me to wear tonight at the Fundraiser as we ourselves went undercover. It's not that I didn't like dresses, it's just I felt uncomfortable wearing them. I wasn't the most girly person you could meet. I was the type of person who preferred jeans and sweat pants than pretty little skirts and dresses.

Natasha looked up spotting me peering around the door. She twitched her head ushering me into the room. I shied away attempting to retreat.

"Don't hide away Caitlin, come out here!" Pepper insisted.

I gulped before I slowly stepped into the room.

"It fits you perfectly," Natasha nodded.

"Wow Caitlin you look stunning!" Jane cried.

I smiled slightly, at least I didn't look as ridiculous as I felt...

I tapped my foot impatiently on the floor of the limo, yes limo I guessed Tony wanted us arriving in style. The guys were already at the location, planning to meet us at the front entrance. My body shook with nerves. My dress wasn't too revealing and came down to just above my ankles. It was jet black and the material felt silky under my touch. It had no sleeves, in stead it came with a strap that went around my neck, the back of the dress dropped slightly just below my shoulder line. My long brown hair had been curled and came neatly down the left side of my head. My eyelashes had ever so slightly been flicked back with mascara. Even for special occasions I had never dressed so formal. The limo eventually came to a stop, and me being brought up to have polite manners invited everyone to leave the limo before me. I had no chance of matching any of their beauty anyway. They all looked so comfortable and relaxed with their appearances than I did. But I guessed they had been doing this for far longer than I had. I waited a few moments after they had left, debating whether to get out or hide in the limo.

I was given no choice when both Pepper and Jane grabbed me by both arms pulling me outside with them. They helped me balance in my heeled shoes that again I wasn't used to or comfortable wearing them. Pepper and Jane continued ahead of me towards the entrance. I couldn't see Agent Hill or Natasha so I presumed they were already inside with Banner and Clint. I looked spotting Tony, Steve and Thor waiting by the entrance. I had to smile, Thor looked so puzzled by the whole thing. I could picture Jane explaining everything to him and making sure he didn't cause a scene. He was wearing a simple suit, I guessed Jane must have helped him pick it out. Then there was Tony as he always was when he was plastered over magazine covers, dressed in a tailored suit with a relaxed expression on his face. My gaze then drifted as it fell on Steve. He too was dressed in a simple suit but he looked as handsome as... well as Steve could. I slightly caught his gaze and looked away. I held onto my arm like a shy schoolgirl as I walked over to them. I felt their gazes fix on me as I strode over. I stopped at the entrance.

"Alright Cap quit staring!" Tony teased nudging Steve slightly. Steve blinked his cheeks going slightly red. I felt the heat rise in my cheeks, he was staring at me?

Pepper sighed as she looped her arm around Tony's, leading him inside before he had time to protest.

Jane and Thor also began to head inside.

"See you in there," Jane mouthed to me.

I slowly moved my gaze to meet Steve's.

"Shall we join them?" he asked me as he held his arm out.

I smiled nervously looping my arm around his, "Sure."

We began to head inside. I stumbled slightly before we made the entrance. Curse my stupid feet! Steve helped me balance myself and I thanked him quietly. I felt the embarrassment rise in my face. 'He probably thinks you're some stupid clumpy teenager! Come on Caitlin be sexy and glamorous, after all he was staring at you!' I mentally scolded myself. I felt my eyes widen as we stepped inside.

The place was huge and looked like it was literally made of gold. Around the room were some tables with small plates of food. Waiters wandered about the place, handing out Champagne on Silver platters. I suddenly close my mouth noticing how silly I must look.

Steve laughed, "Not something you're used to?"

"Not really," I confessed, "I guessed you clearly must be!"

"No I've never really been to anything like this before."

I was generally surprised by his answer. I thought being a famous superhero and teammates with Tony Stark he would have at least been to one.

"Well we have to remember we're on a mission, we need to find Loki!" I muttered quietly.

He nodded as we headed into the crowd mingling with the crowd...

I leaned against the buffet table. Steve had kindly gone to fetch me a drink as I was completely parched. I spotted Pepper and Tony on the dance floor. It seemed he was going to use that old trick, dance and keep an eye on all the guests. He and Pepper were probably trying to deduce which one was Loki.

"Any luck?"

I nearly jumped out of my skin as I looked over to where Natasha was stood with Banner and Agent Hill.

I sighed, "None, how about you?"

Natasha shook her head.

"Where's Steve I thought he was supposed to be your 'date'?" Banner asked.

"He went to fetch me a drink," I said.

I looked at Natasha, "You ditch your 'date' already?"

She laughed, "No he's taking a look around this place, just to be... well sure."

I couldn't blame him. If we were about to be surrounded by enemies I'd like a head's up first.

"I'd better find Steve," I decided as I turned to leave.

I staggered back as I collided with a woman.

"I'm so sor-" I stopped mid-sentence as I looked at her. That dark brown going gray hair, that wide grin, those deep sea blue eyes and her kind face.

"Mary?" I gasped in shock.

Mary's eyes widened, "Caitlin? What are you doing here?"

"That's kind of a long story!" I laughed nervously rubbing the back on my head.

"Friend of yours Caitlin?" Agent Hill asked me.

"More than that! Mary took care of me after my parents died," I replied.

"You didn't come here alone then Caitlin?" Mary said looking from me to them. Her brow furrowed as she looked at Banner and Natasha as if she was mulling something over. Then her face dropped.

"You two... are Avengers aren't you?" she dropped her voice to a whisper.

I smiled, no one could hide anything from her even if they tried. She had a good memory especially when it came to the News.

"I'd rather not mention it in front of so many people," Natasha told her. Smart answer.

"I understand, I guess this isn't just a socialising thing. If you are putting Caitlin in any kind of danger I swear I'll-" Mary started.

"Mary, it's fine alright! Just a small problem but I can handle it," I reassured her.

Mary folded her arms, "I've heard that before!"

I sighed.

That's when my hidden earpiece hissed into life... what? You think we'd do an undercover operation without simple earpieces?

"Hey guys we've got a problem," came Clint's crackling voice, there appeared to be some interference on his end.

"What's up Legolas?" came Tony's voice.

"You've got to clear all the civilians out now! The place is about to-"

But Clint didn't get to finish his sentence as an explosion blasted out from one of the above balconies...

I rubbed my eyes, I had hit the deck with everyone else well Natasha had already dragged me down with her. My ears were ringing from the explosion.

"Everyone alright?" came Steve's voice. I looked up he was stood above us. Soot from the explosion had managed to cling to his suit.

"Fine," I grumbled as I managed to scramble to my feet.

Mary rose next to me.

"What the hell was that?" Mary asked.

"Something not good," Banner mumbled in reply.

Banner was correct. As soon as he had said that I looked up seeing him just as he had been in my dream. There stood Loki looking out upon everyone a golden spectre that glowed blue at the top in his hand. He was dressed the same as before but this time he wore a golden horned helmet. My body then froze as I saw him.

Thanos, stood beside Loki, still wearing his armour and the 'Infinity Gantlet'.

"I'm guessing that's Thanos?" Steve presumed.

I nodded.

Everyone burst into panic rushing for the doors but to no success, their paths were blocked by Chitauri.

"So I guess you must the big Lord Thanos then?" Tony called out stepping from the crowd. He was already geared up in his armoured suit, his face plate was flipped open so his face was visible.

"You guess correctly mere mortal!" Thanos' voice boomed.

Loki just smirked as he looked around the crowd.

"Loki stop this madness!" Thor bellowed in anger, he too rose from the crowd.

"Stop? Why stop when we've only just begun?" Loki laughed.

I shivered, what did he mean by only just begun? What were they going to do?

"Let's see how these mortals are when faced with intimate death. Kill them!" Thanos ordered.

That's when the chaos began. The Chitauri launched themselves into the crowd. Thor went straight for his brother and Tony flew at Thanos. I looked at Natasha.

"Agent Hill, probably best to get these people out of here," Natasha suggested.

Agent Hill nodded as she took off towards the crowd. I spotted her take Pepper and Jane along with her.

"Mary go with her!" I said.

Mary looked at me about to retort.

"Mary I'm not going to argue with you, go with her!" I demanded.

Mary reluctantly followed after Agent Hill.

I directed my gaze back to Natasha, "Don't mind if I tag along?"

"Alright but stay close," she told me. I nodded. I could already guess we were going to head to the source of the explosion. Was Clint ok?

Natasha ran up the stairs, I followed. The explosion clearly came from here. The walls were covered with soot and broken glass littered the floor.

"Barton?" she called out.

"Clint!" I called.

I heard a small moan as the soot figure of Clint Barton rose from the floor.

"Clint, you alright?" Natasha asked concerned.

"Nothing I can't handle!" Clint said, "What's the situation?"

"Loki and Thanos turned up. Thor and Tony are battling it out with them," Natasha informed.

"And Steve's fighting some Chitauri down below," I added.

"What about Banner?" Clint asked.

"I suggested it may not be such a good idea to 'Hulk out' with this many people around," Natasha replied.

"Fair point, I better go back up Steve!" And with that Clint left.

"Right Caitlin I'm getting you out of here and no arguing," Natasha said.

I sighed, agreeing. I followed Natasha out of the wreckage but we stopped. So much for getting out of here, we were surrounded by Chitauri. Natasha turned around standing behind me, we were back to back now.

"Hey Caitlin fancy repeating what you did on Clint early?" Natasha said.

I smirked, "I can try!"

The Chitauri pounced.

I immediately sprang into action.

I swopped down low, kicking my leg and causing two Chitauri to fall flat on their faces. Leaping back up I flipped a Chitauri over me and down to the floor below. I then fought hand to hand with two Chitauri at once. I ducked and dodged every punch, landing a few of my own. The battle continued as I was drawn into more combat. Before long, both me and Natasha had defeated all our Chitauri opponents.

"Come on!" Natasha called as she began down the stairs, I followed after her. We raced down the steps and Natasha led me to the exit.

I followed in her wake, we gonna make it!

I was wrong.

My body was lifted up by the neck in a stone cold grip, one I had felt before.

I gasped as I gazed at Thanos.

My skin went pale.

I looked over spotting Tony's Iron Man clambering out some wreckage. He glared at Thanos, well I could only presume he was glaring behind that Iron Face.

"Don't take another step or I shatter the girl's neck," Thanos hissed. He then looked back at me as if he was trying to deduce something. Maybe he recognised me from the 'dream' I'd had. I gulped, the Chitauri had stopped or been defeated. Even Thor and Loki had stopped their fight. Loki had another slick grin on his face.

"LET HER GO!" a voice screamed.

I turned my gaze seeing Mary stood there. She had a chair clasped in both hands, ready to beat Thanos with it if she had to.

"No Mary get away!" I gasped.

But she didn't listen. She ran straight at Thanos, chair raised above her head.

"Haha your mortals are so foolish," Thanos laughed.

He dropped me hard to the floor. He ripped the chair from her hand, snapping off one of the legs in the process.

"NO!" I screeched as he plunged the leg into Mary's chest. Mary crumpled to the floor in a pool of crimson.

"MARY!" I yelled scrambling over to her. Her eyes were half closed and her breath came out slowly and sharply.

I placed my hand on her chest attempting to stop the flow of blood.

"Just stay with me okay?" I mumbled, feeling the tears welling up in my eyes.

"Caitlin... I'm sorry sweetheart..." Mary gasped.

"Shh save your breath," I insisted, the tears already running down my face.

"I'm sorry I have to leave you," Mary mumbled as she closed her eyes.

"Mary?" I whispered shaking her gently. She was no long breathing and part of me already knew there was nothing I could do to save her. Mary was dead...

I sobbed into her lifeless body, knowing she was never going to wake again.

I rose slightly, still on my hands and knees. Something was stirring inside me, was this anger?

"NOOOO!" I screeched in grieving rage. All the glass that was still in one piece shattered at the sound of my scream.

Thanos who was heading towards the door he stopped turning to look at me. I felt my body rise to its feet but it was almost like I wasn't quite controlling it.

My hands became clenched into fists.

"Caitlin?" Natasha questioned.

"My name is Kubik and I do not appreciate people taking away the loved ones of Caitlin!" my voice spoke. I had no control over what I was saying, this Kubik was in control of my body now. But I surprisingly wasn't afraid, I trusted this 'Kubik'. I had a feeling that my eyes were glowing a deep blue.

Thanos began to chuckle, "The girl is infused with a Tessaract being, how... intriguing."

I held my ground, not even a shiver escaped down my spine.

Kubik strength flowed into me, her voice rang in my head my strength and power is yours use it wisely!

I glared as I shot a beam of blue energy at Thanos knocking him out of the door. He slammed to the ground outside. I followed my palms glowing. But Thanos had already taken his chance and disappeared. I turned returning inside. The building was silent. The crowd had all been evacuated, Loki had gone with Thanos and defeated Chitauri forms scattered the floor. My gaze fell back to Mary, who lay still on the floor. I crumpled to my knees, Kubik's strength faded away from me. Mary was dead and it was all my fault. I began to wail in mourning. I felt Steve's firm hand being placed on my shoulder as I wept. This mess... everything was my fault...