What is the ruling on seeing the 'awrah of a paralyzed father who needs help to relieve himself, when the mother is unable to assist him?

If it is possible to clean the father without exposing his awrah (private parts), then it is not permissible to look at it. The mother can clean him after carrying him. If cleaning is not possible except by seeing the awrah, then it is permissible due to necessity, as Allah the Almighty says: "And He has already explained to you what He has forbidden to you, except for that to which you are compelled."