Opinions needed, Please!

There’s a little girl at my daughters bus stop who had Covid, she was out for two weeks. The kids returned back to school today from vacation and this little girls mom told me that she thinks her dad has Covid but won’t go get tested…In my mind I freaked out because why are you sending your child to school if you think the dad has Covid?! Mind you they all live together and he just started showing symptoms…Would you call the school and alert them or just mind your business?