Their Reasoning
It was a difficult and demoralizing thought to comprehend, but Shelia had lived a long and painful life. The In-Sync crew had to accept that euthanizing Shelia would provide her a calm conclusion to her existence.
A Chance
Shelia’s rescuers did not want to lose her. She had lived her life as she intended to, having spent the majority of it in captivity. That’s why the team wanted to offer her the opportunity to appreciate the life she had left.