dunno. depends on the exact circs.
But in all honesty, i'f try to disarm and restrain i think.
obviously, if someone stood before me with a gun and said, hit this woman or i will shoot you and then her, i'd hit her.
But in the normal course of predictable or commonplace events which may well occur in my life, i can't envisage a scenario where i would have to hit a woman, no.
What if they only threatened to shoot you?