She thought she could move on but she didn't realize what she would be missing, especially since her husband can't satisfy her. Now that she's got it back, she's not letting go. Also, in some of these stories, it's the guy who leaves her, she moves on, and then he comes back later to reclaim his bitch. Lastly, she was CLEARLY an absolute whore in her younger days so settling down wasn't exactly the first thing on her mind.