Player is lured into the woods by a creature disguised as a nymph, basically. Player then allows creature to wrap its arms around him. Creature decides this is a great time to unhinge its jaw and begin to devour its prey. The rogue, who was not being very stealthy at the time decides to fire at the creature's mouth.
Creature, knowing that the rogue is there has planned for this, and wants to use its prey (another PC) to block the arrow with his face, so it can then devour a slightly warm corpse.
How is this handled by the fate rules? This is a point of disagreement between myself and the group (which required me to negate the whole situation so as to not hold up the game).
How the dice actually played out:
Rogue - Used 3 free invokes on an Aim aspect to give himself a result of 11 on his shoot roll.
Creature - Invoked 4 separate aspects (some on the player's sheets, one on her own, and one scene aspect), to come up with a 12 on a physique maneuver
I would have modeled this as the creature succeeded on a Defend action, and now the player who is being used as a shield needs to contend with the entire 11 points of attack (being allowed to make a Defend action as normal).
While the creature did indeed succeed on a Defend action, the player only needs to deal with the difference between the attack and defend rolls, namely 1 point of stress.
Are either of these interpretations correct in either FATE Core or The FATE System Toolkit?
n.b. It should also be noted that the players are pretty averse to taking consequences and this kind of situation where they attempt to turn the rules around so that they don't comes up pretty often.