Maria didn't notice her absence until she spoke, Angel was not comfortable with the fact that she was not seeing both Chris and Jane so she decided to bring it to notice
Grace could see her and she knew just the right thing to reply to her with
"I want to believe you are not daft, you just said now that she was his maid, what will she be doing here if he's not here, to serve you?" she asked
Angel didn't know what to say she just kept mute and said nothing and continued eating her food
Chris was still inside his room, he heard what Grace had said and he wondered what could be wrong with her, he was also drowned in his problems right now, the fact that he has children and has no idea where they are alongside their mother was driving him nut