Do you see a therapist? You have a lot of anger in you about this situation and about all family members involved and I’d run it all by a professional.

Your mother in law doesn’t need to live with you. But your husband doesn’t need to abandon his mother either. He is coming up with solutions. He sounds like a good man to me. You are upset because he helps his mother but would you rather be married to someone who washes his hands off his parents?