I thought that it was between the players families the fighting.
Not the actual players.
I am not convinced that Justine hates BOTH the williams sisters either as it seems to be just Serena that she has the issues with.
I would like to think they are independant and are both legitimately injured and Justines withdrawal has no bearing on the fact Kim previously withdrew.
When they come back they may be in a similar situation that both Venus and Serena were in when they returned to the tour.
Queen Vee, Super Rena, Krazy Kuzzie