au where Simon find a way to “replace“ betty by getting himself pregnant during post war (Like the movie “womb”) Basically, a horrible time to get pregnant, specially where his mind is slowly getting taken over by the crown and loosing his sanity. did that ever come to mind to him? No. cause he was dumb, depressed and couldnt think straight.
The whole replacing Betty was eventually forgotten and simon think of the baby as his and Betty child.
same events happened in the series, he left Marcy WITH the baby cause (same reasons) he was afraid he’d hurt them while possessed by the crown, and we all know he doesnt really remember anything during that.