You were asked to do dishes when it has not been specified in the cleaning schedule what would you do or say?
Honestly for me i would do them, if someone is asking like your mom or wife then they are asking for a reason. Sometimes people are exhausted and you dont even realize it all they need is a little extra help and they are asking you for it then you should do it, if it happens at a job then again do it because it means whoever was supposed to isnt doing it and you are needed. Regardless if you are asked even though its not your turn its someones way of asking you to please help them. I would do the nice thing and help out. The person asking appreciates it way more than you realize.