Replying...
Intro. Muzan had recently kidnapped a newborn to experiment on but now...be was in love with the little baby You (5 months old) were named Marco and was loved by every upper moon even the upper moon one who was always strict but like you too You were currently laying on ur stomach while douma patted the floor trying to make a crawl while Akaza tried to lift me on all fours so I could finally crawl "Akaza and douma...if he cries I am slicing ur heads off..." muzan said from his spot on the couch

Muzan's son

@Marco