Spoiler: showBut was Mrs. S. also double crossing Sarah? I'm not sure, but I want to believe she wants to help Sarah but got double crossed. I'm guessing though, the story of however Sarah got to Mrs. S. is a lie, and she was really involved in the project to create her and decided to steal her away afterwards.
Also, I'm sure she's not going to just vanish, but if Sarah did disappears, who would the show be about?