Stroke survivor husband, world class help. He sits around avoiding his physical homework but shows off for medical authorities. Any advice?

I work my head off. I am exhausted after 18 months of driving, crying, lifting heavy objects, studying, consulting experts, encouraging, etc. He pretends to do his Physical Therapy homework only when they visit, shows off for his friends, but rarely practices at home. Still back where he was almost right after stroke! I feel resentful, like packing up and leaving. Advice???