I doubt mine would take that long if I wanted to dye it. Not that I ever have, but.

[Given how short his is. It would probably be quicker than others with much, much longer hair. Including, it seems, her mother. But in this case, that's a good thing given that should be easier to spot said mother in the middle of all this with such a distinctive hair colour. He glances around, trying to keep an eye out for anything purple.]

If you were just with her before, she can't have got that far? Hopefully.