I'm so sorry I took forever to get to this, I had no motivation to write cause I got some tough requests lol, anyway's I really hope you enjoy this :)
OH ALSO, this came out as a small fic/drabble if that's okay skdhdjsjsbd
You and guys had just finished eating dinner so you were washing the dishes while Giyuu was with the kids outside. You hadn't thought much of it until you looked out of the window to see your kids beating your him with sticks, he wasn't even trying to dodge their "attacks" so you went outside to see what was going on.
You put some shoes on and stepped out side. "What are you guys doing?" "We're beating daddy because he won't teach us how to fight with swords!" You chuckled and looked at your husband "you know Giyuu, they are old enough to swing swords. Just let them practice with some wooden ones so they don't hurt themselves." He looked at you and looked back at the kids... And back at you... And back at the kids... "Alright.." The kids were jumping with joy "thank you mommy!" They said hugging you while Giyuu got some wooden swords for them.
"Y/n, can you please go back inside? You can watch through the window. I just don't want you to get hurt." Giyuu said while coming back with the swords. You nod sit at the window watching them, they were so cute. They way Giyuu moved and how the kids struggled to copy him, you could have sworn you heard a little "daddy stop showing off!" From your youngest child. It all made your heart warm and fuzzy.
To Giyuu, he was taking this very seriously. He taught them easy ways to sneak up on demons and how to sprint without having to stop to breathe. The kids had literal stars in their eyes as Giyuu was telling them stories of how heroic he was, After that the kids ran inside asking you to come out and listen to Giyuu tell the stories.
You wish this would happen more often, seeing them all happy makes you happy.
Hiii! I really hope you liked it, I'm not use to writing stuff like this so I'm sorry if it's not what you had in mind :)