Sabito x demon reader

He knows

(Am going to make my own upper / lower moon because the upper Moon's are really strong)
Sabito POV:

I been walking for an hour now and I finally made it to a village where the demon take place. I walk around looking for someone who needs help.
After I help everyone I saw something behind me. I jump back dodging it's attack. I look up and see it's was one of the lower moon. "You, you the one who ran off with the demon king's  daughter". I don't say nothing I run up to the demon getting ready to cut it head off but he grab it and got close to me. "I can smell you had mating with her the master won't be happy about". Soon he said that he broke my sword. "He broke my sword how"?! The demon grab my shirt and hold his hand up. "I hear that you the strongest out of all the hashair so that means if I kill you I'll because a upper moon". I grab the demon arm  he was getting ready to hit me with and kick him off of me. I look around trying find something I can use to kill this demon. I saw a sword laying on the ground. I run to it but I feel a very painful feeling on my leg. I look down at me leg and see my uniform pants had rip and I saw my leg turning purple. "Don't even try it my poison gets worse and worse every time you move". I look at demon and back at the sword. "I don't care about the poison all I need to do is kill this demon". I stand up annoying the pain I feel on my leg and grab the sword. I turn to demon and run up to him cutting his head off. I try to walk away but my body gave out and I pass out.

(The next day)

Yn pov:

I was outside with the kids drinking some blue spider lily tea. Soon the kids got done drinking there tea they was out in the sun training. I smile at them and hoping that sabito come back soon. My ears pop up and I turn my head to see Makomo running up to me looking nervous. "YN....yn, we need to go to the butterfly effect now". I didn't have time to say something as Makomo pull me with her as my kids follow behind me. We made it to the butterfly effect and into a room. I see giyuu, tanjiro and nezuko around the bed. I slow walk up to the bed with f/n and m/n next to me. "Sabito" "dad". I look at sabito body with purple marks almost taking over his hold body. "What happened". I cry holding sabito's hand. Giyuu told me that he didn't know and that the people sabito save took him here. "Mom is dad going to be ok". "I'll be ok f/n don't worry I just need to keep taking my medicine to get rid of the poison inside of my body". Everyone look at sabito who had woke up. "Sabito the medicine is not doing NOTHING to the poison you need something else". Sabito smile and didn't say anything. I wrap my arm's and tail around him and tell him to relax. I feel sabito's body go weak and my purple fire puff around sabito's body. "YN"!!!!"MOM"!!!! Everyone yelled and try to pull me away from sabito. I let go of sabito and my fire and the poison marks on his body was now gone. "There I killed the poison and you should be better in a few days". Everyone had left and leaving me and the kids with sabito. " next time I'll go with you and leave the kids with giyuu and Makomo". Sabito agree.

Muzan POV:

"So that hashair got my  daughter pregnant and had two kids now....so that means    Those two kids might have blue spider lily in their blood lines if I can get my hands on one of them and get they blood I'll be unstoppable"