If she's repeating herself that pretty much normal for her age. It's when she looks at a set of keys and doesn't know what they are for is when you have to start worrying. I bet she can tell you things from way back even before you appeared on the scene and will be as clear as the day it happened. Short term memory gets hard for them sometimes and that's pretty much normal for someone that age. When they do repeat themselves you just agree with them and don't make a big deal about it. Does she live by herself or a retirement home? I take it your dad isn't around anymore? Cherish them Fred they're not here forever and tell them everything you've wanted to say because one day you won't be able to.