Is there any blame upon a mother for refusing to sleep in the same bed with her sick, mentally incapacitated husband, due to the presence of an adult girl in the same room? And is there any blame upon her for not obeying him a few days after his death?

If the husband requests his wife for intercourse and she refuses because there is a mature daughter in the room, then there is no blame upon her for refusing. This is because the presence of children who comprehend the meaning of sexual intimacy and are affected by it is a valid reason for the wife not to be obligated to comply. However, merely sleeping in the same bed without intercourse is permissible, and she should have obeyed him in that instance.