Mom Winchester was played by a different actress. I am pretty sure. Unless they just did a great job with make-up and acting. And that could be.

Yes, I am very sad for both of the boys.

And quite convinced that the 'human twisted by demonic forces' who will break the seal (which Ruby mentioned) is in fact SAM and not Lilith.

AND I am really really hoping there's a very good reason Cas was ordered to let Sam out. And that there's something redeeming to that. I dunno what I will do if they totally just say God is a big meanie once and for all. :(