She had no intention of running away, from Carter or the marriage. Her wish was still the same, to annul the marriage. However, her purpose in returning to Saco was also not because she missed Reef. She even still doubts her feelings for Reef. When she fluttered in Reef's arms, when she was swept away by Reef's kisses, she didn't know if it was due to her sincere feelings, or just a past obsession. Similarly, she doubted Reef's attitude towards her. Does Reef really still love her or does he just want to satisfy her heartache by playing with her.
There was one more thing. Red House. She lied to Reef. She had not lost her interest in the house. It was just that the conditions Reef put forward at that time made her angry. However, now she had changed her mind. Maybe she should stay with Reef to test how she felt about him.