I am not sure what is wrong with my mother. Some days you can go to her house and have a regular conversation with her, spend the day there and everything is fine, then there are the other days that she complains about everything. What can we do???
Call her and find out in what mood she is? Only visit her if she is in a good mood. Or if you have to go there to help her, stay as short as possible when she is complaining. Be wonderful to her when she is nice. In this way you strengthen her nice parts and weakens her wish to complain.