Dream of mother

I got a dream of my deceived mother that she has come back to our place . she is cooking for us and we all are scared that how can she come back. We are discussing what to do in the dream while she is cooking for us in kitchen. she is offering us food which we are hesitant to take but we eat . what does this dream mean. In fact we are discussing to perform any rituals so that she can go back Please reply I am really curious to know as what is this dream all about .