Sadly we all know Bav won’t clean
My kids had covid and my husband and I made the choice not to go into work (I have 2 jobs) and 1 I worked from home. My kids were not isolated at home, we didn't wear masks, just ventilated the house well, cleaned well, tried not to let them touch things like the fridge, drawers etc, so they basically got waited on. And lots of hand washing etc. I had to do my choir online and didn't go anywhere as didn't want to risk passing it on to anyone vulnerable.
I bet her son had it first but she didn't test. How can they justify going into work when they have it in their house.