
The Millers are literally a family of giants. They are extremely tall ( Nathaniel for example is 218cm tall), even as children. So it's either the Miller genes or the artist messed it up, since Cecil should be at least 1 year younger than Spence.
Josh was pregnant with his third child in the last chapter (epilogue after a timeskip) of the KML main story. In that chapter he sends Yeownoo a picture of Pete and Cecil. Yeonwoo thinks that one of them is a girl, but Keith tells himthat Chase only has two sons ( he knows that from Grayson).
In the side stories, Yeonwoo mentions that Josh has 3 children, 2 sons and that the third one is a girl.
Josh likes to dress up Cecil in cute clothes, since he looks a lot like Chase.
And Cecil started to do it willingly after meeting Spence for the first time... .
He himself doesn't really like wearing girls's clothes, he does that for Josh and Spence.

Ooo okay, that makes more sense. I was thinking that the kids are just tall for their age but I didn't know if it was a small mistake in the art.
I read the part where Keith said they had two sons, but then they said they had two sons and a daughter and I got confused by the timeline. I understand that Cecil is dressing up in feminine clothes, I just assumed he liked the clothes and didn't think much of it but it's kinda cute to hear that Josh dresses him up like that and then he started doing it willingly after meeting Spencer. Hopefully he can be free from frilly dresses if he wants to be lol.
So do Chase and Josh have three children or two? I think I read in the side story in one of the later chapters where it said they had two sons and a girl so I'm a bit confused, or is Cecil just dressing up as a girl? I'm also a bit confused because Spencer was conceived before Cecil, so wouldn't that make Spencer older? I guess Cecil is taller and probably more cunning for their age but I was a little confused by that.
I really like Zig's work! I read the other story and the side story as well and it was really good! I was honestly surprised to see the art style for this one because I noticed this art style in another Josei, romance comic and I didn't know they also did yaoi. It was a pleasant surprise! I think they're art style is really nice!