It was Gandalf, not Perseus's voice, that woke her. When days got bad like this she was always stuck between sleeping away the pain, or sleeping away the haze the drugs gave her. The doctor said he couldn't fight remnants of her death, so the medicine was all he had.
A good thing, in the end, because at least she could try and function with the medicines. She wanted to be a good wife and let Perseus come home to a table set for him, and someone to listen to him. She knew he loved her, and she wanted to keep that.
And she considered her duty as a wife.
But when Perseus called, Gandalf raised his head and barked happily at his new master, and it woke her. Stirring she sat up to turn the light on. It hurt her eyes but the drugs had taken away the blinding pain. She smiled and waited to stop the spinning. She'd only fall right now. "Thank you love. I'm sorry."