Survivor since 2012
I too have the BRCA2 mutation, and have had breast cancer twice -- first in 2000 on one side, then in 2011 on the other side. The second was not a recurrence but a new, more aggressive type of cancer. My mother did not have breast cancer, although she died young (45). It seems the mutation is on my father's side, and my sister also has it.
Did your Mom have any radiation or chemo after her diagnoses? Any follow-up therapy like Tamoxifen, Femara, etc.? I know with the mutation it's hard to predict what will happen in the future. There's nothing in particular that points to you having a recurrence, other than the fact that your chances are increased because of the mutation. I've been told to remain diligent -- frequent checks -- and to act immediately on anything suspicious.
Good luck to you and your Mom.