Mil not washing hands before touching baby

my mil always comes home after work and not washing hands before touching my newborn ( 1 week old only ).. somemore now covid situation its so much more dangerous. How do i tell her off? And how do i know if my baby isnt feeling well after? I scared my baby got covid or germs cux of that, she literally touches his face and hands while i am breastfeeding him... I uses wet wipes and warm cotton wool to clean him after but not sure if its clean enuf... she also lean rlly close to kiss him...