Contact with infected person

[CharliecharlieCHarlie]

This is my first time posting , I'll try and keep in short & sweet & to the point .
My grown up daughter has COVID , tested positive 15/12 .
We have all kept away UNTiLL my ** of an ex husband took it upon himself to go round to my daughters , after yet another bust up with his mess of a partner .My daughter should of sent him away but for some reason didn't , he sat at the other end of a longish room for an hour and kept his mask on apparently the door behind him was also open .
Now if he had gone straight home after and stayed indoors for however long then I wouldn't be writing this. Alas he did not .The next day he met up with my son, daughter in law and their 14 month old baby , who already has a bad cough (had it for a while) My son asked if he had seen my daughter , my ex lied and said he had not .
My daughter messaged me yesterday and asked me to not to tell my son that his dad had been sat round her house .I'm due to have my son here at the end of the week and am now feeling anxious as *.
I've told my daughter she should tell my son but she thinks I'm overreacting
Options please?

Just tell the truth, or that makes you as bad as your ex and your daughter.

Bearing in mind there is a vulnerable baby here, I would not be covering anything up.

Of course they have to know!!

I would just tell them. However, I think transmission would be highly unlikely in the scenario you are describing. Dh has just had COVID. He got it from one of his employees. They spent 12 hours together (no masks), part of that time in a very tight enclosed space with no ventilation. Dh was the only one of the 8 or so of them to get COVID from this person. We then spent 2 weeks at home altogether in very close contact (no attempt to isolate dh really, though he did sleep alone mostly because it coughing was annoying). One of our dc did get it. I provided regular close personal care to her. I didn't get it, nor did our (unvaccinated) other dc . More than likely, your son and his family are fine, but I would tell them so they can take LFTs regularly.

Tell the truth, it’s only fair, then your ex. Can take the flack

You can't lie about this they need to know their risk is greater than they might otherwise think

Thanks everyone , I have since told my daughter I will just go ahead and tell my son as I really don't give a about upsetting my ex .Shes now saying this is going to cause her alot of stress which she doesn't need as she's poorly . I get that and I don't want to upset her but I also don't feel good keeping it from my son. My ex has always been a liar (she knows this) which makes it all the more annoying she's covering for him !