Who washed a medieval queens clothes?

Answer 1

Women in the royal households had washer women of their own, but they were not ordinary washer women. They had to be trusted to keep such questions as whether the queen might be pregnant to themselves.

Answer 2

The assumption is that serfs and laborers washed their own clothing. We do not know this is always true, and it might not have been in towns because poor people in towns did not have kitchens and did not cook for themselves. They bought prepared meals from vendors, and might have had people wash their clothes as well.

Wealthier people had servants who washed for them. In some cases, such as the clothing of queens, the washers had to be carefully chosen so they would keep whatever secrets they knew about the health of people in the household. The question of whether a queen was pregnant, for example, was very important.