Sometimes the house is like a revolving door. After Spanish daughter #3 flew home, son #1 moved back into his original room. This mean the room where son #2 sleeps had space for a friend of his to live here for a while.
This young man was originally living with another friend in the area, as he is not from our town originally but now works. But there, due to work restrictions, they cannot host anyone outside of their immediate family members. It is too much risk.
A silver lining for today: having the opportunity to get know this young man.