My girls don’t usually ask me to write about anything. Normally, they’re begging me not to mention them, their friends, the strange ways of teenagers …. anything, basically, which even touches vaguely on their lives is strictly off-limits. Until I bought them new brushes the other day. One of the awful things for divorced children is that they get used, in theory at least, to travelling between parents, constantly on the move. This was an aspect of the whole business…