The way I see it, the injunction not to work on Sundays if possible would logically include making other people work for you in unnecessary secular pursuits. Ok, so try to avoid shopping on Sundays. Inconvenient at times, but not impossible. Now being single, I usually go to Church with my parents on Sundays. They like to go out to eat after Church and so do I, but I don't think I really should (see above). I have expressed my thoughts on the subject and my mother says if they went home, she would have to cook and that is work for her. I would hope hers is a labor of love while the restaurant's employee's are working for cash. Also, I love my mother and don't want to place any extra work on her shoulders if I can help it. I have thought of avoiding the meal, but that is skipping out on valuable family time on Sunday and being a wet blanket to boot. I have considered offering to make breakfast myself, but I am sure my mother would just feel obligated to cook instead then. I would like to hear debate on this.
Hopefully you won't mind my being blunt enough to say that your mother deserves a day off from cooking. It is not up to you to decide that she should cook so others don't have to work nad that it should be out of love. I worry when I hear discussions like this and I wonder about scrupulosity. I am really happy a term for it exists. Charity is what is needed to answer this question. Legalism is something very hard to tolerate. So either you cook for them and insist or you go out. Done.