What a surprise ending. Even though she didn't appear in the last couple of episodes, her name was still in the credits so the return of Marjorie shouldn't have come as a total surprise, and it didn't what it was still very surprising in way. Of course, from a dramatic point of view it makes perfect sense. Adam and Heather are happily married and even thinking about kids. I loved the romantic shot of them in the strip club and I loved how she had quit and he had bought out everyone there.
On the other side, Brian and Bridget are getting closer, so, like a said, from a dramatic point of view the reappearance of Marjorie makes perfect sense.
I've never really liked Marjorie, so I hope whatever plans they have for her, fail and she disappears again soon.