I feel like the Source baby was actually just the Source

It didn't make any sense that the baby was fine before but then all of sudden it was a dark void of pure evil with no soul as soon as Cole let himself be killed. Especially not after the way it suddenly started acting with a counciousness and it's random nonsensical hatred of Paige and then trying to jump ship to the Seer on its own and going to her. It seems more like just like how Cole was possessed against his will when he killed the old Source because hes half demon , his child whod also being half demon even though it was still a developing baby was with Pheobe when her and the sisters killed Cole the Source essence also jumped ship to the baby.

It took over the baby just like it did Cole in like another last ditch effort just like it did with Cole and it was trying to ressurect/incarnate itself in a new perfectly made more powerful vessel/body. Made from already two powerful lineages. Belthazor's/Cole's lineage already in Source candidate range of power with Source powers infusion and Charmed witch Halliwell lineage.