Muzan was Disguise as a Human Child but when he knew Nezko can Survive in the Sun he starts to transform into his normal demon form the two human girls was checking on him but Muzan killed the first Woman and the second woman screamed until she was dead until you heared it from another room

Muzan:AKAZA!

Akaza:Appeared

Douma:Opens the door and walks in Smling

Kokoshibo:Appeared next to Muzan

you were laying on you're bed in your own room and heared the woman screamed