While I don't have that exact situation, I do sometimes feel like peoples demands for me get a bit too high at times...its like they forget the reason I am at home not working is because of having mental problems significant enough to cause disability. Not sure how your family gets along, but maybe you just need to sit them down and talk to them about this...explain you are disabled and have difficulties day to day and can only help out around the house so much. Like yesterday I got in a bit of an argument with my mom thinking I wasn't doing enough around the house, and I told her it was because I felt really overwhelmed like everyone expected me to keep the whole house clean and watch the dish sink like a hawk to make sure all dishes get in the dishwasher or are immediatly washed so it was getting very difficult to know even where to begin with any cleaning tasks.

But we came to the conclusion I could do the floors once a week or at least close to that I don't think it will be the end of the world if I missed a week and help with the dishes if needed...So yeah maybe talking to your parents would help, it could be they don't realize they are kind of taking advantage...then again some peoples families aren't reasonable so I cannot garantee such a discussion would go anywhere useful.