I usually say, "Right now, or can it wait a minute til I get to a good stopping point?" If he says, "now" I go, because he is very independent and doesn't ask for help unless he needs it. After all, he cooks, cleans and lets me sew....and helps me whenever I need it. Then he also asks if it can wait a minute and if I say no, he comes right away, so turn about is fair play.