This was the initial case at this QTH. Just my XYL Marianne was positive. I tested negative. But within three days, all four of us were positive. It is VERY infectious - and we had really good hygiene discipline at home too, distancing, hand-washing, wiping down surfaces and door handles etc.
Fortunately, the illness has proved to be mild for Marianne, Jimmy M0HGY and Liam, and completed in around 7 days. It has been more problematic for me, causing an unpleasant viral condition called labyrinthitis, but I am nearly fully recovered now too. So I hope the condition is mild for your XYL, and yourself if you get it.
Today is my last day of isolation - so fingers crossed I can be back out activating tomorrow!