Covid?

I am due in 3 weeks but most likely going to deliver sooner. We have been extremely careful with Covid and staying away from people who have traveled and been exposed, during early pregnancy my husband worked in the Covid ICU unit. I know most people do not get it that bad. It he had 4 pregnant women who were all past 33 weeks and had to be intubated, have emergency c-sections, and then were not even awake or conscious for weeks to hold their babies.

Now my sister and her kids live with my parents, the kids father took the kids and then 2 hours later called and said he was extremely ill and she had to go pick the kids up. He will not tell what was/is wrong with him.

Would you quarantine from them for the 14 recommended days?