Now that Sid's kidnapper has been revealed, how will this be explained? I can surmise that Anna would want to get back at Stef for Tony's demise, but how did she manage this on her own? Was she lurking in Salem all this time? How on earth, even if she knew about Sidney, did she know she was in Cleveland, that Nicole was at the bus station, etc.
And is she figuring on keeping the baby or what? How much does she know?
If memory serves me, Anna was pretty much an absentee mother to Carrie. Maybe this will factor in?