every time i go to my 99's house , i will do the washing up, because she already cook the meal for us, as a daughter-in -law , i think i should do the washing up.
also, when we have dinner at my own mother's place, i will ask my husband to help. although my mother never let him to do anything.
I don't need to wash, just help to clean up the table only. Seems it's a tradition that my dad-in-law to cook & my 99 to wash from the day I meet them.