Its barely better than a .22, Its slower, albeit heavier. I would hope that you value your wife enough to try to get her moved up to a more potent round for her own self defense.
Not to say that .32 would not work, but there are so many better options with VERY little downsides to them, that I would not let my think it was adequate. But then my wife daily carries a 1911 ltwt commander.
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