Please provide some details as to the lineage of your mother, i.e., what was her name, where did she and her family live, when did they live there, etc. It is impossible to know who or exactly what family line you are asking about. If I know who you for, maybe I can fill in some blanks for you and perhaps you can fill in some blanks for me.
Where have you been looking for your mother's family? The obvious places include local public libraries for local history information and the records offices in any counties where the family may have lived. Your local library may also have access to Ancestry.com and other online resources to help you "flesh out" the family bones.
Be careful about putting too much faith in memories of family members. Many times those family tales get embellished or trimmed as they pass from one generation to the next. Try to back them up with historical local records from government offices, churches, etc.