Sam had got wind that Rowena knew how to remove the mark of Cain. So he tricked her into going to a warded warehouse, where he put her hands in long chains so she had to stay and do the spell to remove the mark.

Dean had no clue about any of this. So, unfortunately, you got tasked with the job of watching Rowena.

She was at the table, ‘reading’ some books, while you sat across from her, very bored, and looking off into space.