That one was fun to write!
Thank you so much for the suggestion, Chat_Coccinelle!

"You went missing for three months and now you just show up here?!", Chat Noir hollered as he saw his partner walking around the corner, a thick coat wrapped around her upper body and a scarf hiding her chin to protect her from the cold.

She had surprisingly called him after her had spent three months worrying, panicking, searching for her. She had just vanished from the surface back then, without saying a word, and just today requested a meeting.

"I-…I'm sorry, Chat Noir…", she brought out and something in her voice was thick but he didn't care. He pulled her further into the warehouse where they had agreed to meet up to be alone, a snarl obvious on his lips.

"Oh yes, now you say you're sorry. Of course. And you couldn't have had at least let me know you're alive?!", he grabbed her shoulders, turning her towards him, his gaze sharply fixed on her eyes, "I searched the whole city for you when you didn't show up anymore! I thought Hawkmoth had gotten you, I thought you were dead! And now you just-… You show up as if everything was fine?!"

"Nothing is fine!", she retorted, tears shining in her eyes but he was too busy being upset to care for that.

"Well, for me neither! I was alone the whole time! I-… I thought I had lost you!"

She pressed her lips together, obviously waiting for him to finish before trying to explain herself. He gladly took the chance to throw everything in her face that he had worried about.

"I was alone, I was scared for you and while I know you're an adult, you should've at least told me you were going! No, you wouldn't even have to do that. Just telling me you'd be fine would've helped already! I ran myself ragged by searching for you, I spent night and day on the rooftops and I screamed my lungs out! You probably even heard me!"

The first tear rolled down her cheek but she still remained silent as he continued getting louder.

"And, where were you?! Did you need a break?! A break from being a hero or from me, huh?! What the hell went wrong so that you couldn't even tell me you're alive?! How should I have known?! The media is breaking down like hell above me and I couldn't even answer!"

He let go of her and pushed her back a little, now spinning around before coming to a halt a step away from her, facing her again.

"And that's just the public and my worries for you! What about-", he gestured in the air between them, "… Us?! Hell, my lady, we slept with each other! We-… I dare even say we were a couple! We kissed and I loved you and I'm not even sure you loved me but feeling you was enough. Having you by my side, through fights, patrol or in the bed, it was enough for me. Problem is that it meant something for me! Didn't any of this mean anything to you?!"

"It-… It did, I just-", she began but he interrupted her, shaking his head.

"Oh, nonono. I'm speaking now. You abandoned me, you left me in the cold, you let me doubt myself. You made me ask myself what I did wrong! You didn't even care one bit about me, huh? Over all the years of being my partner you didn't even stop once to appreciate me. Either I was a help or a burden but I never even was your friend, am I right? Am I right?! And I didn't even stop to think once, once why you let me so close to you. I thought it was love but I made a grave mistake."

She was trembling by now, her hands laying flat on her jacket. He briefly wondered why she wore one and why it was so thick, after all it was still above minus degrees and she had never needed one the past winters. That made him wonder even more, for example why she walked here, but he still had to say a few things before he could properly listen.

"Listen, my lady, I'll forgive you either way because I'm still a lovesick idiot. And you know that.", he sighed deeply, pinching the bridge of his nose. His sharp claws softly brushed over his eyelids, "I-… I don't even know if I care why you vanished. At the moment I honestly just wanna take revenge on you, make you feel what I felt. But well, you won't care anyway."

He waited for a moment in which her forced sniffles echoed through the empty warehouse, then he straightened up again, crossing his arms in front of his chest. He towered over her with good half a head so he looked down on her. After shouting all of this out he felt slightly better, even a bit curious why she had decided to crawl out of her hole so suddenly after three months of nothing. Damn chesire curiosity, honestly.

"Okay, I'm calmer. But while I don't really care anymore why you vanished, I at least wanna know why you're showing up again, wanting to meet me."

She brushed over her cheeks to dry her tears but even more followed to follow in the same tracks. After a short sob she sighed and looked at him, her gaze desperate and even a bit sheepish, her voice shaky when she spoke up.

"I-… I needed you to know…", she began and only continued at a stiff nod from him, "… I don't expect anything from you. I don't expect you to be there for me or them and I-… I know you probably won't want that anyway, but I want it."

"You're being cryptic, my lady.", he grinned but it looked more like he was baring his teeth. She closed her eyes briefly, then she brought both hands to her jacket again, seemingly holding on to something even though her hands were flat.

"I'm going to keep it.", she resumed without giving his comment any attention, "I have my parents and a few close friends to help me. My best friend already said she'd marry me if she could but she has her own fiancé. I just-… I wanted you to know that I'll go again. It was hard enough to convince Tikki to transform me one more time but-… I'll be gone. Probably for a whole year, maybe even longer."

He growled as he tightened his crossed arms, narrowing his eyes on her.

"What?! You're gonna leave me in the dust again?!", he stepped towards her and now really bared his teeth, his sharp fangs shining. But she never stepped back.

"Yes, Chat, I need to.", she tried to stand her ground but Chat still heard her voice shaking, "I need to be there for the child."

His eyes widened and he instantly looked down, seeing her opening her jacket. Her stomach wasn't really big yet but it was already a very visible bulge. He could tell she wasn't that far along, maybe at the beginning of the second trimester somewhere. His arms fell to his sides and he took a step back, mouth agape to see his lady like this. She cupped her stomach, a loving expression on her face.

"I-… I want to keep it. It was quite a surprise but I'm financially stable, I have the support of my family and friends and I've always wanted a child. I-… I'll have to go again, Chat, but I needed you to know."

He couldn't answer yet, his shocked gaze wandering over the stretched fabric of her magical suit on the rounded bulge again and again. So that's why she had vanished. Still, without a word, but that was a valid reason.

"You-… You're pregnant…", he finally choked out, his mind both working at the speed of light as well as not working at all anymore, "Wh-When-…?"

She brushed over her stomach once again, looking up to watch him.

"… I found out about three months ago.", she finally said, the words punching him in the guts once more. He was helpless as she closed her jacket again, staying unmoving two steps away from her. She adjusted her scarf and sighed, then turned to go.

"Oh and-… Another thing.", she threw over her shoulder, her voice small and weak suddenly, "About the baby… It's yours."

He was ready to drop dead when she left the warehouse, out into the cold weather again, probably to walk home.