In that case fair enough, but 'if you knew my mum it was a mistake' sounds like an implication that she makes a lot of mistakes driving, obviously you meant she wouldnt do it on purpose.
If the spaces are poorly signed, write to the council, there should be little signs at the start and finish of teh diabled bits, and on lampposts in between, if it covers that distance, or at least i belive thats the standard marking.