After the meeting

Female giyuu au and alive sabito and dabi to and they already have 1child that's still a baby and it's about 36months or something idk but no one knows about the baby also baby is female

Hashiras spy on giyuu and find out the truth

Trans giyuu/ giyuu just hide the fact that he's a girl and makes it look like she's a boy

Sabito is alive in this au so it's sabigiyuu but a giyuu harem