Prompt from Ao3/tumblr user saberin
"Nico, you said you this wouldn't happen, that you told me you wouldn't," Eli walked up to Nico, who was just about to take off her shoes, having come back home.
"Welcome home Nico! I missed you Nico! How was work Nico?" Nico said with a saccharine tone of voice as she finished taking off her shoes. The last thing she wanted was to come back home to Eli's nagging "It was tiring, by the way, thanks for asking," she added and crossed her arms.
"I'm sorry, but-" Nico's tone of voice had told Eli to back down, but she couldn't let this slide again. Never again. Taking a deep breath to compose herself, Eli took another step forward. "No, do not change the subject, Nico. This is the third time you've-"
"Second."
"Second time you've said this. Remember three weeks ago? When I found you with-"
"Yes, I remember. You made it hard to forget with how you almost cried." Nico reminisced as she put her shoes to the side. When she tried to take a step forward however, Eli blocked her path. Nico could see a glint of coldness in Eli's blue eyes that she had not seen since high school, when Honoka was trying to put μ's for the first time. She now felt a knot in her stomach: Eli was dead serious about this.
"L-look Eli, you're getting so upset over something so silly, and it really wasn't my fault this time, you know?" Eli had suddenly become an intimidating force to be reckoned with and Nico had to tread carefully and figure out how to defuse the Russian ticking time bomb.
"It never really is your fault, is it?" Eli raised an eyebrow, her eyes seemingly unblinking for Nico. "Then whose fault was it this time? Rin and Hanayo? Nozomi? Or was it Maki?"
"Hey, it wasn't my fault that Rin and Hanayo happened to bump into me after work, or that Nozomi had stalked me to find out when my shift ended! Or that Maki had… had…" Nico grew silent, realizing that the Nishikino incident had completely been her fault. She also quickly took notice of how she wasn't making a convincing argument for herself.
"Well Nico?" Eli's voice grew colder and more impatient with each passing moment. Last time Nico had heard her talk like that, she was forced to sleep in the couch. Granted, the one who couldn't last sleeping on her own was Eli, so after a couple of days Nico was back in bed, but she would rather not sleep in the cold living room on her own again.
"Look, remember yesterday? I had my day off, but you got called to fill in for someone who got sick and weren't home all day?" Nico took Eli's silence as a yes, "well… I had been promising for weeks that I'd go see the kids but I couldn't, so when they noticed that I was home alone, they came to visit. And Cocoa helped herself to your chocolate pudding without asking. L-look, Nico will buy you another one, okay?"
Eli felt her stomach drop as she finished hearing Nico's explanation. She basically just threw a tantrum in front of her wife over a pudding that her sister-in-law, a middle schooler, had eaten. Shame would not let the blonde look at her apologizing partner in the eye. Apologizing for something she had not even done. Eli now had to apologize too and-
"Nico will buy you a box of them!"
Eli meekly looked at Nico, "a whole box?" she asked with a voice as small the smile she was trying to suppress.
"Nico promises. Just… don't make me sleep on the sofa. Please?"
"You won't," Eli's frown had finally flipped to a smile, much to Nico's delight. The taller girl opened her arms for a hug and Nico promptly hooked her arms around Eli's neck.
Nico swore Eli got so childish over the most trivial things, but that was one of her few quirks that she loved about her wife.