Should children be legally obligated to care for their parents after they become adults?

Should children be legally obligated to care for their parents after they become adults?

I dont think they should. I think that once a child is an adult they have their own life, and maybe even started their own family. Most people will care for their parents naturally but to make it a legal obligation is unfair. It may mean that the child would be tied down for many years caring for their parents. Some people are lucky and are not really ill, but say if a 50 year old mother had a string of illnesses and their 20 year old son HAD to look after him, it doesnt give him the free will to have his own life xx