Muichiro felt nothing but guilt, disgust. How could he let this happen?

You two grew up without parents, he took the best care of you. Even though Muichiro wasn't the one to socialize with others, to you, he made an exception. He didn't think it was annoying when you peppered his cheeks with your small kisses, loving his head pats, and silently getting into his bed at night, thinking you did a pretty job at being quiet when he was awake, but didn't want to burden your fun and acted along. Muichiro wanted to protect you. You, the purest person he knew.

You became a Demon Slayer to follow his path. When he told you not to, you became one anyway.

Only if you knew this would be the thing ruining your life.

Your mission partner you had for missions was a guy, Rin, Muichiro didn't approve. Rin tried to get in your pants, he would the moment he had the chance. Yet, you were too innocent. Muichiro told you that a lot of times, but you told him that he was just overreacting and it was alright. When it clearly wasn't.

A fucking week. He was away for a mission as a Hashira, and when he came back, things weren't the same. Rin knew about Muichiro leaving. He took this as an advantage, and invited you to his home. When you came there, as soon as you came in, he locked the door. When you asked what he was doing, his lips were slammed against yours, your eyes widening in fear as his hands started to pull your skirt up, undressing you. That night was horrible. Rin forced himself inside you, so many times. All that was heard the woke night was your moans, cries and begging him to stop. It was like an endless nightmare.

You were pregnant. When Muichiro found out, he was devasted. His baby sister. His innocent sister. Was pregnant. Had a baby in her. All he could do was to comfort you, cry with you. You never saw him this weak. The further the pregnancy got, the more he took care of you. He ordered you to leave the corps, forced you to. And when you gave birth, he was so glad the child looked exactly like you. Not like the father. But it was saddening. A 13 year old girl. Had a child.

✧

Good morning. How's the little troublemaker doing?

Muichiro asked with his usual calm tone as he came in to your room in the morning, when you were on your bed, your son Aquamarine Tokito sucking milk from your breasts while holding tight to you with his tiny hands, Muichiro coming closer to sit on the chair next to your bed. It was saddening to see, he was looking at you very sad. You two looked like siblings. But I'm reality, mother and child. Well, choosing the name for your child, being a kid yourself, you didn't have quite good ideas. But since he had bright blue eyes, you named him 'Aquamarine'. For short, 'Aqua'. He could see how flushed your cheeks were while the baby was sucking on your breast, squeezing it with his small hands. It felt so weird for Muichiro Nibble marks all over your small, not mature chest.

He looks like you, Amanai.

He mumbled, reaching out his hand to caress the small Aqua's hair, how he let out a giggle, clinging more to his mother, babbling against your chest. That warm smile you had for your child, it was a new smile you had, even Muichiro noticed it. It had nothing but adoration for your baby son. A mother's love.

Ah..about what I wanted to say.

He spoke up, not sure if he should say this, looking down. His hands were clenching and opening again, he didn't want to remind you of your trauma. But this was a theme he had to bring up sometime.

It's about Rin. I met that bastard today. Even after the beating up session I gave him, he had the audacity to show up and say that he..wanted to marry his pretty 'breeder' to take care of Aqua with you.

It made your brother furious. For that guy, you were a 'breeder'. Not a mother. The mother title was something you deserved. You were a minor, yet took the best care of your child. Better than some adults. And that bastard had the right to call you that. And the worse thing? He had every right to marry you. He really did. Because Aqua was his son.