User blog comment:Ikmeos/Demonic power level, powerful weapons and the primordial siblings./@comment-91.89.184.182-20170227225904/@comment-82.145.221.127-20170227231252

The begining of what exactly? The only logical sense is that she meant the beginning of her plan she enacted at season 11. Also, you just said at the same comment that God hinted "she was always there". What is always there cannot have a begining and an end. These siblings are of the same age. This also proves the fact that I stated before and it's confirmed in the show.