"Oh, no, no, I didn't mean to guilt-trip you or something, Hera. You don't have to do it. I'm so sorry," Abby said, still hugging Hera. She squeezed Hera tightly in her embrace before letting go. Hera smiled in understanding and wiped Abby's tears with her fingers.
When a good person intentionally hurts someone, and if that someone happened to be their dear ones, their conscience wouldn't allow them to rest peacefully afterwards. The burden of guilt becomes unbearable, especially when the other person only has good intentions at heart. Sometimes life would get cruel enough to make a wise person turn into a bad one.
Abby never wanted to hurt Hera, but the unfortunate difficult circumstances forced her to do it. She knew Hera would've never betrayed her had the situation reversed, and Hera was in her shoes. But Abby was weak and scared and chose to become selfish.