Provided she actually DID make those threats. You know how to tell if a government official is lying? Watch their lips. If their lips move they're lying.
How would they know she had any guns unless she told them about it? Or why would they care? Or even suspect that a random South Jersey Orthodox Jewish housewife had a couple of guns?
This is New Jersey, which has the lowest prevalence of legal gun ownership of any state except for Hawaii. Firearm registration is not required in the state -- notwithstanding the pile of other draconian NJ gun laws.
I trust politicians and gov't officials about as much as I trust any pathological liars, but I doubt they went to her house to confiscate her guns just because she read the Constitution.