In the end Emma was already leaving,then the one night stand with the son was just "happened". She was leaving because the father was not interested in being a father again, all he seemed to want was for her to go back to school. She could see she was not going to be happy, so she made her choice, and apparently did not mind the dilemma she put the father and son into. The fact that the father and son became closer after that fact is bizarre considering they did not have a close relationship and the fact she slept with both should have made it worse and not better. And I believe the child is Wendell's as Emma comments she wanted a child after they were "legit" so she was not trying to trick anyone.
Review of Woman Wanted
