There are only three women! A grandma, a mum and a daughter. The grandmother is mother to the mum, and the mum is mother to the daughter. The mum is the daughter of the grandma and the daughter is the daughter of the mum. Does that make sense?
Grandmother, Mother, Daughter: Grandmother and mother are both mothers; Mother and daughter are both daughters. Idk, just guessing. =P This sounds right to meh though. :3