Mama Bil | Billie eilish x Nonbinary reader

𝒪𝓃𝑒

"You fucking weirdo!" Mason says as he pushes Reuben down. They land with a thud in the hallway and whimper in pain. "What did I do?-" they ask as their eyes well up with tears. "What did you do? Look at you! You can't even pick if you want to be a boy or a girl, it's disgusting!" he says angrily. He kicks Reuben in the gut and is only satisfied when they slump over and sob. He then takes their headphones and throws them on the ground before stepping on them and making sure they're broken. "Barcode bitch," Mason mutters as he walks away. Reuben can feel themself regressing and, even though it isn't safe at school, they can't stop it. They go to the teacher's bathroom that they were permitted to use and call their friend. He picks up almost immediately. "Reuben? Where are you?" Reuben interrupts him. "Finnus- mawcus he- " they cut themself off with a sob. "He bwoke my headphone an- he kick me- an caww me names-" they manage to rush out. "Where are you?" Finneas asks. "Teachew bafroom," they respond softly. "Stay there buddy, I'm gonna come get you," he says and some shuffling follows. "Otay Finn.". They stay on the phone as Finneas makes his way across the school. He knocks on the bathroom door. "Rue? It's Finn, you can open the door buddy," he says softly. Reuben opens the door slowly and hangs up their phone, shoving it in their hoodie pocket. "I like your hoodie, is it new?" Finneas asks. Reuben nods. "Who's on it?" he questions, hoping to help distract the younger teen. Although he knew that it was the strokes he knew the question itself would serve as a distraction to help deescalate their thoughts before they got too bad. "Is da stwokes- ou know dems, siwwy finnus" Reuben answers with a giggle. "do you wanna go home buddy?" He asks. Reuben thinks and then nods. "Tan says bye to Zoe an dwew?" they ask. Zoe and Drew were two of the only kids who respected Reuben's pronouns, partially because Zoe themself used she/they pronouns. She was ecstatic to learn another student was nonbinary. After being friends with the girls long enough Reuben told them that they were neurodivergent, but left out the part about their regression. "mhmm, I'll just tell them you're nonverbal for now okay?" he asks softly. Reuben nods and holds out their hand. Finneas takes it and leads them through the halls to Zoe and Drew's class. "You wait here okay?" he asks. Reuben hesitates but nods. Finneas knocks on the door before opening it and walking in. Reuben waits patiently and after a few minutes, Finneas returns with Zoe and drew. They give Reuben sad smiles. They open their arms and the two girls hug them. Finneas must have explained everything, except for the regression. Maybe telling them wouldn't be so bad. They could help care for them when Finneas is busy, especially since Finneas is a senior and they were juniors. (senior = 12th grade, junior = 11th grade) Reuben pulled out of the hug and tugged on Finneas' shirt. He bent down and asked what was up. "wanna teww dems," they whisper. "You want me to?" he asks. They nod softly. "Okay, so you both know that Reuben isn't neurotypical right?" he asks. The girls nod. "Well, for some people, neurodivergent or not, everything can be too overwhelming to stay 'big' and they can use a coping mechanism called age-regression. Right now Reuben is a toddler in their teenage body because they couldn't handle their emotions Properly, so the only way their brain knew to handle them was to revert to a time they didn't have them. " (a/n this is not at all a professional input, this is based solely on my experience and how my meltdowns and regression connect with one another). The girls have mixed reactions. Zoe silently nods while drew looks deep in thought. However, it isn't uncommon for the brunette to be stoic. Zoe opens their arms and hugs, Reuben, making sure they know that she doesn't see them any differently. Drew on the other hand takes Finneas to the side and asks him some questions. "so how old are you right now?" Zoe asks. Reuben looks to their hand and holds up three fingers. "awe a little baby," she says while ruffling their hair. They whine and push her hand away. "zozo messing haiw ups-" they giggle. She lets out an awe and smiles. "do you want me to fix it?" they ask. Reuben nods softly. Zoe carefully fixes their hair and tucks stray pieces behind their ears. "thankies zozo!" they smile happily. "You are very welcome Ruru," they respond. Finneas and drew come back and Drew's expression has softened. Drew often needed to ask many questions to better her understanding of things before allowing herself to react. She never wanted to jump to any conclusions. "alright reu, say bye to Zoe and drew," Finneas says, reminding the teen of their original objective. "By zozo, by dwew-" they say sadly. Zoe and drew both give a goodbye hug and say their own goodbyes. Finneas holds out his hand and waits for Reuben to grab it. They grab his hand and follow him to the parking lot and the car. Finneas opens the door for Reuben and buckled them in before making his way to the driver's side and fastening his own seatbelt. He then cranks the car and begins the drive to his house. "We're gonna hang out at my house okay?" he asks softly. Reuben nods. "Get see peppew?" they ask. Finneas chuckles softly and nods. "Do you wanna spend the night tonight or go home?" he asks. "Stay nigh, got cwofes?" they reply. "I'm sure we can find you some. My little sister has tons of baggy men's clothes that you might like," before long Finneas pulls up to the curb and parks the car. He gets out and helps Reuben before leading them to the porch and inside. "You've never met my sister have you?" Finneas asks after a while. Reuben looks up at him and shakes their head. Finneas' sister had always spent the night at a friend's house when they stayed over. What if she didn't like them? What if she was mean? What if she found out their deadname and told the whole school? What if- Finneas shakes them lightly. "Yo Reuben, are you okay?" he asks. They feel pulled from their headspace. "Shit- yeah I'm good, sorry Finn," they apologize. "Big now?" he asks. They nod. "Your sister, she isn't homophobic is she?" they ask. He chuckles. "Billie? Homophobic? God no, she and Zoe are like best friends. I'm surprised she hasn't introduced you two yet," he responds light-heartedly. Why had she not introduced them? "Can we keep my regression a secret from her?" they ask while playing with their hands. Finneas' playful expression changes to a lighthearted one. "Yeah, don't worry about it Reu," he reassures them with a comforting pat on the shoulder. Reuben truly felt lucky to call Finneas a friend, and his platonic caregiver. "wanna play rock band?" Finneas asks, trying to ease the younger teen's nerves with something he knew they enjoyed. Their eyes lit up. "Yes please! I wanna go change real quick, do I just grab what I want from Billie's room?" they ask. Finn nods. They walk down the hall and find Billie's room rather quickly. They open the door and immediately feel a calming sensation. The red LED lights reminded them of their room at home, a safe and comforting space. They step inside and look around, band posters are scattered on the walls including a rather large Justin Beiber poster. They cringe at the shirtless man and look to the bed which was messily made but in a comfy cozy way. A Louis Vuitton blanket was draped over the wall next to the bed. They find the closet after remembering their objective and pull it open, grabbing a random hoodie planning to sleep in it, and their gym shorts. They made their way to the living room and rummaged through their bag before pulling out the mens basketball shorts that they wore during gym class. After they made it to the bathroom and changed they returned to the living room and stuffed their clothes in their backpack. Finneas had just finished setting up the game by the time they had gotten done. He handed them one of the guitars with a smile as he set up the drums in front of himself. They positioned the guitar on their lap and put the strap around their shoulder. After a few songs the front door opened and Maggie walked in along with a blue-haired girl in baggy clothing and a spiked choker. She looked sleepy and didn't seem to notice Reuben was there. She walked straight to Billie's room. Oh- she is Billie. "Oh, hi Reuben, are you spending the night?" she asks softly. They nod and reply "yes ma'am". Maggie puts some things down and then picks up her keys again. "sorry to leave you guys but Patrick and I are going on a date night. You guys behave okay?" she asks referring to Billie and finneas. He nods and Maggie leaves. While Reuben and finneas are picking a song to play they're interrupted. "Finneas! Where's my hoodie!" Billie yells. She storms out of her room and makes eye contact with Reuben. "who are you and why are you wearing my hoodie?" she asks angrily. Reuben whimpers and holds their arms close to their chest. Billie scoffs. "Cant you speak? who the fuck are you?" she asks. Billie's yelling triggers Reuben to slip into little space. their eyes well with tears and they sob into finneas. he carefully hugs them and pulls them onto his lap. "Billie I told them they could borrow one. you have over thirty hoodies. pick a different one. " finneas replies coldly. Billie is taken aback by the harshness of her brother's normally warm tone. "who are they?" she asks again. "they're my friend, and you made them cry. now please go pick a different hoodie." he says, although its more of an order than a request. she scoffs again and leaves. finneas rubs Reubens back softly. "it's okay buddy, papa Finn is here, you're okay. " he reassures them. "no wet biwwie get mes- she scawy-" they sob. Billie overheard the exchange but in her anger ignored it. She texted Zoe about the situation.

"Zoe Finn brought a friend home and they're so weird, they called him papa and they're talking like a baby"

"bil do you realize that you don't even know them yet? You can't just assume that."

"well, no"

"but"

"but nothing bil. Finn took them home from school because they're neurodivergent and had a meltdown."

"oh"

"yeah bil. Oh. They age regress when they get scared or overwhelmed. You fucked up."

"shit. What do I do Zoe?"

"I don't know. But you fucked up."

Billie sighed and began to google age regression. After reading up o. It she had come to realize that she might actually enjoy being a caregiver, but unfortunately she had just ruined her opportunity to try. She opened her door and looked to see Finneas and Reuben cuddled up under a blanket watching a Disney movie. Reuben had a pacifier in their mouth and had fallen asleep against Finn. "hey finn-" Billie said softly. He grunted instead of speaking to indicate he Was still upset with her. "Okay I get it, I fucked up. I talked to Zoe and they explained everything." she tries again. This time he speaks but his tone cuts through the tension sharper than a knife. He covers Reuben's ears before speaking, "You did fuck up Billie. Besides, I'm not the one who deserves the apology, Reuben is.". Billie opens her mouth to speak but finneas cuts her off, "and I don't think they want to be anywhere near you while they're little. They're scared of you and I'm not gonna let you hurt them more than you already have. You should just go back to your room or go to Zoe's. " he finishes. Although he is angry he managed to appear calm, but his calmness was somehow scarier than yelling would have been. Billie took a deep breath. His words stung her more than they should have. She didn't even know the person in her brother's arms. She wanted to ask about his girlfriend but decided not to since the man was already angry with her. She walked back into her room and shut the door, playing music on her speakers but being wary of the volume. After an hour of struggling to sleep, Billie finally managed to drift off. Finneas carefully stood up with Reuben and took them to his room. He tucked them into his bed and then set up an area on the floor for himself, not wanting the younger person to wake up big and be weirded out. He grabbed a spare blanket and pillow before making himself comfortable and falling asleep on the floor.