If I am asked, with the full ability to say no, then I am more than willing to go out of my way to help/accommodate. If I am pressured, pushed, demanded to do something with no ability to freely say no...then I refuse. Demands are not respectful. If you don't respect me enough to ask, then it is NOT in my best interest to comply and at the end of the day I have to look out for myself first.

Some people just don't care and don't respect others (or themselves) enough to care. If you are receiving a lot of demands it means the relationship is not healthy and needs some changes. I tried to explain this to my mother-in-law years ago...