Yosef Karo

“ Sweeping the house, rinsing glasses and making the bed – they do not fall into the category of work for a mourner. And so too, it is permissible for a woman to bake and cook during the days of her mourning (what she needs, but what she does not need, is forbidden) . And so too a woman serves in the house of another head of household, and her mourning is taking place, she is permitted to bake and cook and to provide for all the other needs of the household whether she serves free of charge or for a wage. ”

“ Even something that would cause a [financial] loss (as opposed to work done for monetary gain) is forbidden to the mourner to do – whether it is he, his servants, his maidservants, his sons, or his daughters since he is entitled to the product of their labor (lit. hands) .
Seif 5: It is forbidden to do work through others (even a non-Jew) unless it is something which has the potential to depreciate since something which depreciates is permitted to be done by others. ”