What does it means to dream about having babies for someone in their mid-40s?

My mother been having dreams about having babies for the past two nights and she in her mid-40s. She cant be pregrant and has granddaughter from my other brother which he 23 years old and he has a girlfriend that he been with for almost a year and half. However my niece isn't my brother's girlfriend's daughter .My mom adores her granddaughter so much. And I'm 18 and I know I'm not pregrant. So is there a possibilty there going to be another baby in this family or is it something else. Or does anyone know any dream websites that can help me with this?