Or testicles and possibly getting testicular cancer... which is of significantly lower incidence than breast cancer anyway.
The genetic mutation she carries is almost a guarantee that not only will she get breast cancer, but that she will get it young, that it will recur, and that she will eventually die from it... just as most of the women in her family already have.
That's where her decision is coming from.
I'm sick of tits being held as more important than a woman's decisions... save the "tatas" my ass... save her life, even if that means cutting the damned things off. She doesn't actually NEED them you know.