I re-watched the episode yesterday and found it interesting that when Regina and Gold were talking in the hallway Regina said “The only reason I agreed to make a deal with you was . . .” which implied to me that Gold went to HER to her to make the deal. That means that Gold wanted something. So it appears that what happened is that Gold got what HE wanted out of the deal and Regina didn’t. So from my point of view I don’t think that Gold is working with Regina at all. He still appears to be working his own agenda only now he has Emma to help him do it – only she doesn’t realize she is helping him.