Well, if she has five kids who are "normal" (I tend to think nobody is truly normal), then it's physically impossible for one person to be half a boy. So, for one half to be boys, the other half must be boys as well.
Get it?
A writer is a world trapped in a person— Victor Hugo
Ink is blood. Paper is bandages. The wounded press books to their heart to know they're not alone.
Edna began to feel like one who awakens gradually out of a dream, a delicious, grotesque, impossible dream, to feel again the realities pressing into her soul. — Kate Chopin, The Awakening