Actually I think it's the mommy and daddy's baby but I guess they are taking care of the baby (≧∀≦)
Yes I'd like to believe that Chunsam having the dream (of a stork bringing them a baby) actually became reality!
I'd like to believe it is their baby but on chapter 58.25 they mention the baby is a male whereas in 'The Lady and her Butler' the baby was a female （￣へ￣）
Maybe the author change her mind and like 'heck let's have them a baby girl cause why not?' XD I mean they are obviously Min Gyeom and Chuseom(It's obvious even if the author's art style slightly changed)
Oh sweet jeezaz they have a baby!!! It's at chapter 69 at the lady and her butler waaaaah ٩(๑❛ᴗ❛๑)۶