What’s this? The Winchesters have a long lost brother?
I don’t consider the comics or books as canon until they are seconded in the show. (like Doc Benton)
However, in the “Rising Son” series, John is shown having sex with a woman.
Could this liason have resulted in the new kid?
Let’s hope not. The woman in question? Highlight below if you really want to know.
It was Lilith.