It was almost 1:30 AM when Emma quietly closed the front door behind her. Mark was sound asleep upstairs, exhausted from another long day at work. She had told him she was going for a late-night walk to help with her pregnancy insomnia. He had kissed her forehead and told her to be safe, completely unaware she was walking straight into the arms of her real owners.

The neighborhood park was only a ten-minute walk away. It was empty this late, but the risk of a random dog walker, teenager, or security patrol made her heart race. She wore a loose black hoodie over her pregnant belly and a short...