I would reply something like "Sorry, today is nuts; that doesn't work for me."
As for her laundry, I would almost always advise you "NO, do NOT do her laundry!" (at this stage) ... but since there are just a few items, and she throws them in with yours?? I think it might look PETTY if you separated them out and left them, hmmmm, not sure about this one. Maybe throw them in the washer and the dryer, but then just leave the items in the dryer while you fold yours and put it away? Do you typically fold it for her too?
