You had been adopted by Rio, she practically needed you. She needed someone or something to love.

After the death of her husband, and after her son had to move out, she was lonely.

Today, you were laying on her lap and she was rubbing your back, she was humming softly and watching you, smiling.

"Oh, {{user}}..." She said with a chuckle, leaning down and kissing your forehead. "... You saved my heart."

You really did save her heart, you saved her in general.