Your "scenario" is a Communist's/Facist's pipedream, where guns don't exist, except in theory of course in the hands of those the Government controls. So while she waits for the constable, in utter horror, with her being overpowered by his illegally acquired weapon/gun, getting raped for the next 5-10minutes, her daughter is made to sit and wait her turn
So, in this current reality.....Take away her firearms and then tell the mother to defend herself & daughter from an armed rapest. Notice again where your logic is severely lacking?
We'll NEVER have a country where rapists, murderers, terrorists, can not illegally get a gun...unless there were no guns in existance...which ironically, that will NEVER happen as well. The 2nd amendment is......wait for it.....SETTLED LAW