Fitz sat alone on Simmons's bunk, his stuff packed in a box and sitting at the foot of the bed. It was late, and everyone was asleep, unaware of his move to his partner's bunk. He needed to be closer to her again, and he felt this was the only way without sleeping in the lab. He didn't have the heart to move her stuff, so he left that in place, hence why his things were still packed away.

Sniffling, Leo wiped tears from his eyes, trying not to cry again. Jemma's sudden death had shattered him. She was his other half and she held his heart. Now that she was gone, he didn't feel whole. He didn't know if he would ever be able to feel whole again. Stray tears rolled down his cheeks, and he took a shuttering breath. If only he told her… if only he told her…

He wasn't angry at Jemma. He could never be angry at her. Of course he wished she told him that she was dying. Perhaps that might've been able to find a cure for her once more…

Picking up her journal gently, Fitz skimmed over her last note. She loved him, and he never got the chance to tell her he loved her too, or the chance to say goodbye. He remembered how she seemed so hesitant to leave the lab the day before her death, and he remembered how she kissed his lips before leaving. Most of all, he remembered how persistent he was in getting her to leave.

He gasped for air, trying to muffle the sound of his sobs as he started to cry once more. If only he didn't make her go back to her bunk! Maybe, just maybe, Simmons would still be alive. It was his fault she died, it was all his fault!

Earlier, when questioned on how Jemma could've died, Fitz said nothing about what she wrote in the journal, so he allowed them to perform an autopsy. The team had tried to comfort him in different ways, but he shrugged them off, unable to try and bring himself to get over it and feel better. "If only we stayed at the academy," he choked out softly, wishing, no, dreaming that Jemma would walk into her bunk and smile widely when she saw him there. And then he would tell her he loved her as well and how much she meant to him.

Pulling out his cell, he opened his drafts and wearily sent a text that was long forgotten in there. Shortly after he had sent it, Simmons's phone started vibrating. Leo stared at it brokenly, knowing it was his text that went through; his text that told her that she was more than a best friend to him. If only he had sent it earlier…

Resting his head against Jemma's pillow, he closed his eyes and breathed her scent deeply. His heart was hollow without Simmons there.

A sudden knock caused Fitz to sit up quickly, eyes widening as the door slid open. Coulson stood there, face grim. "I'd thought I'd find you here," he murmured, causing Fitz to flinch. "I have news from her autopsy."

Leo's gaze sharpened as he looked at the older agent expectantly, even though he already knew what had killed Jemma. "The Chitauri infected had invaded her system again. Fortunately, it's not contagious like the last time." Fitz closed his eyes, leaning back against the wall. Coulson heaved a sigh and rasped, "There's something else that was found as well."

Fitz sat up in alarm, leaning toward him. "What is it, Coulson?"

The senior agent stayed silent for a minute before whispering, "Leo… she was pregnant."

The young engineer froze, breath catching in his throat as the room spun, blurring together and messing with his vision so everything seemed darker and fuzzier. Fitz barely heard Coulson's words of sympathy and sorrows and he shook of the older agent's hand from his shoulder, not wanting the comfort.

He didn't want Coulson; he wanted, no, he needed Jemma.

Coulson finally left him alone as Leo let out a strangled sob, his head resting back against the cool window. His grief was overwhelming, drowning him, and he had no problem not trying to fight it.

He grabbed Jemma's pillow and buried his face into it to muffle his screams of emotional agony. Four days ago, when everyone else was doing what they needed to do, Leo had found Simmons in the bathroom throwing up. No one else was close by to hear her, and he only found her because he was getting worried when she didn't appear in the lab.

After comforting her and helping her clean up, Jemma apologized profusely, saying she didn't know what was wrong. He knew his partner was telling the truth, and he got Coulson to give them the day off; Fitz wanted to make sure Jemma was alright.

Now that all made sense to why Simmons was sick before her death, other than the fact she was infected once more. If only she told him she was dying, then maybe they could have worked together again and made another cure, a cure that would permanently heal Jemma. Tears stung Leo's eyes and streamed down his face, the pillow falling down into his lab as he broke.

FitzSimmons was no more.

Only Fitz.

Only Fitz…

I know there's conflicted information, so I'm going to leave it up to your imaginations on what happened.