I can see Itachi with Sakura and/or Naruto *if* they become more important to Sasuke than and, for some reason, he can't kill them and he wants to become the centre of attention for Sasuke again by destorying the relationship/mindf#$king with Sasuke/possibly getting information on Sasuke.

Likewise I can see Team 7 doing it (a) under illusion, (b) to get information/bering sasuke back/helping sasuke kill him - but I can only see then in a realtionship in a very f#$ked up, twisted dark world :>