Since you are the natural children of your mother who is hospitalized where your step-father refuses to provide you with information as to her condition, I would personally go down to the hospital where she is located and personally speak to her treating physician and the nurses who are attending her.Be prepared to introduce yourself, advise that you are the children of her, show identification is asked and then ask the questions that you need to ask. If you are allowed to visit her, look at her medical chart. It may provide you with the needed information.