Oh, @itsostylish, I am sorry. This is a typographical error.

He stared out the window behind him

He's looking out of the window behind her. This gave her the chance to study him better.

The doctor did sit on the bed, she had a feeling someone was in the room with them and she realized she was right when the doctor rose from the bed he sat on to meet her on hers.

The line that read, 'As if answering her unspoken question, the stranger rose from the chair', should have been, "As if answering her unspoken question, the stranger rose from the bed"

I apologize. I'll do better with my description next time.