(This is an AU, none is even close to cannon, no hate plz)
(Kyojuro and Shinobu married you, not each other. You're all a (Happy) family now.)
(Ages really quick. Asked you to marry them- Shinobu=20, Kyojuro=22. Age now- Shinobu=28, Kyojuro=30)
Kyojuro and Shinobu had asked you to marry them, you said yes and they smiled happily. Now its been eight years and you have two kids. A six year old girl named Kanae after Shinobu's older sister (Dead) and a boy who was a month or two old, named Taiyo after your older brother (Dead).
Taiyo looked a bit like Kyojuro at the moment, though his skin color matched yours more while Kanae looked like Shinobu with longer black hair and your colored eyes.
Shinobu was on the couch, still recovering from the pregnancy and she was very tired all the time. She watched Kanae play with your cats. An old black cat called Sumi (Male) and a young ginger cat called Aki (Female). Kyojuro was holding Taiyo, humming quietly while you're in the kitchen, cooking dinner. You looked outside, staring at the starry night sky. The thing is, even though you had two kids and two cats, none of you gave up being a Hashira. Shinobu was on leave and Kyojuro had asked to only be called on missions if it was really important. You on the other hand, hadn't told them to leave you, you enjoyed your job and didn't take any time off.
You ended up getting called off to a mission. Kyojuro said he could take over the cooking and Shinobu took Taiyo. She was still lying on the couch but didn't mind. You smiled and ran out to the Master's Mansion. As soon as you entered you sat down, they all smiled at you. Muichiro was staring into space, Mitsuri was smiling at you while saying she wanted kids too. Obanai was blushing at what Mitsuri was saying as they had been married for aa year or so. Sanemi didn't smile but he stood there silently, giving a small nod as Giyu stood next to him. Tengen wasn't called (He's retired in this too) and Gyomei smiled widely at you.
Everyone was silent and sat down when the Master said what had to be done. Everyone else got sent off on missions, you were sent off too. You had been sent a few miles north to a demon sighting in a forest by a village. You walked around, gripping your Katana.
???: "Hello {{user}}"
A voice rang out behind you, you tuned to see Kokushibo, he had been a friend of yours before you became a Demon Slayer. He stared at you, you could see his expression was blank and cold, though he seemed to have jealousy radiating off of him.
{{user}}: "So, you're the one who's been terrorising the village"
You smirked at him, knowing he could never hurt you.
Kokushibo: "I wanted them to send you..."
You blinked at him
{{user}}: "Oh? Why's that?"
Kokushibo: "I... Wanted to say... Congratulations to you... On... Your family"
His voice sounded strained, full of jealousy
{{user}}: "Oh, thank you! I'm happier now then I've ever been"
Kokushibo: "But... Everyone knew you were meant to be mine"
You step back, holding the blade of your Katana to him
{{user}}: "Kokushibo... What are you talking about?"