Hello whitewitch Laundry/clothing can represent your persona or outer image.
In the dream, how did you feel about him seeing you doing your laundry?
What kind of laundry was it?
Does this simply reflect the more "intimate" knowledge he has about you?
Does he know about a lot of your "dirty laundry"? If so, how do you feel about that?
Is there something about your image/persona that you need to change or "clean up"?
Dirty laundry could even be associated with feelings of guilt. Anything like that?