"MAMA, NO SIBLING!!!!!!!!1"
"koushi-dono, let's give him sibling"
"for celestia sake mama listen to me"
"we are bound to eternal contract as you are my wife"
"MAMA!!"
"KOUSHI-DONO!!!!!"
while childe dealing with post-partum by his own, without zhongli even knowing, when he's alone with the baby, it is his own baby who cheers him up with innocent gestures and coos. thus, he believes that this child is one who'll never betray him for the rest of his life