@purpleboy people are being unfair because they are leaping on terminology (what exactly "self-isolate" means) and not acknowledging that this woman has done everything she has been told to do and is acting in accordance with the guidance she was given.
She also came on here wanting support because of some negative reactions she was getting and the tone of so many responses has been judgmental and unkind.
She's put her head above the parapet by trying to find out what she should be doing and is complying with the approach that has been advised - that is more than a lot of people. If you're honest with yourself you will realise that her hugging her kids/sending them to school is pretty low-risk compared to a lot of people.
Case in point: I work in central London, take packed commuter trains each day. Office building next door has had a CV case, someone collapsed with it within 100m of my building, positive test at the gym 200m away which at least 20 of my colleagues use daily. Oh and I was in Asia in December. And I have a mild cough, no fever. But can't get tested for CV and 111 guidance says I don't need to do anything. I can't stop going to work or pull my kid out of nursery because it's a job not a hobby. I'm pregnant so I have been to the hospital for a test - again apparently no issue although who knows if at some point I've been exposed.
Ok, I'm washing my hands and wiping my phone but am I 100% sure I'm not a carrier? No. There are literally hundreds of thousands of people in a similar situation. If you're completely honest with yourself I bet you're not holding yourself to the same standard as you expect from the OP.
If I was medically vulnerable I would be quarantining myself and trying to sit this out rather than leaping on anyone who might of had contact to stop touching their children. It's not realistic to assume at this stage that any individual who might have come into contact with the virus is aware of this and able to restrict their interactions with others to contain it fully.