Cloud. Sakura knew that person. He had been the one to help Asuka many weeks ago during one of her first curses when Sakura had been absolutely no help and Asuka was in need. He had come to her aid and they became friends quickly after that. She also knew how recently the Pleasantville event had turned them into a married couple and Asuka had honestly seemed so... different then. She was happy. Sakura knew she had strong feelings for Cloud and cared for him deeply but she could not even begin to imagine what he had said or done to cause her this much anguish. The thought alone made her feel protective and want to teach him a lesson in her own way, but she had to calm down and know he probably had his reason, whatever it was. Men.
She began to pet Asuka's long red hair slowly with one hand, keeping the other arm firmly around the girl's back. She wanted to calm her down, to soothe her until she was able to speak without devastating sobs. They broke Sakura's heart.
Her last words made a lump grow in the kunoichi's throat but she blinked away her own tears and swallowed roughly, a feeling of intense sympathy coursing through her.
"I do," she said in a weak voice, clinging to her tightly and resting her head on the other girl's. "I do love you. I'll never leave, I promise. I love you." She made sure to emphasize those last three words, understanding the impact they had on her.