Is it sexist to tell my fiancé to not walk alone at night?

I probably sound like a misogynist but I insist my fiancé never walk alone at night when she gets off work. I realize this sounds sexist but I simply don’t trust the creepy men out at night.
Is it sexist to tell my fiancé to not walk alone at night?
Is it sexist to tell my fiancé to not walk alone at night?
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