@syag
Our local health authorities have been telling us that 3 weeks is a more realistic time frame than the previously used 14 days, Especially in the 15-40 year old group. She may have been able to be tested and confirmed earlier but not having a raised temperature, she was not a priority for testing.
She self isolated upon return, her husband has been at his parents and her kids have been with us (and all our other grandchildren) since March 12.