Timber WOlf Attacks
Can Saturn Girl (w. COMPEL) then use her special power to add 2 to Timber Wolf's Attack Value, and Compel him to attack again? When she adds the +2 to him, he is friendly, but during the MC'd Compelled action, he is not (is he?)

Sorry if this question is confusing.

Timber Wolf is on your opponents force correct? Doesn't her poweron work on friendly pieces? He doesn't become friendly until after you mind control him and you can't use actions (even free ones) in the middle of another action so I would say NO.

Coffin, he said Compel, not Mind Control.

Why would he not be friendly if Compelled? Compel doesn't say anything about becoming hostile; they start out as part of your team, they stay part of your team.

Don't think you can do it. I bolded the key bits from the power:

So you couldn't carry over the +2 from the first attack to the Compel'd action, nor could she use this power in the middle of her Compel. But she could try it after the 1st action and the Compel action.

Er... can she make a free action after her Compel but before TW takes his Compelled action? I wouldn't think so (but I've been wrong before).

I'd say standard Mind Control rules apply - the MCed fig's action has to be taken immediately after MCer's attack roll.

SG's special power works to the end of an action, correct?

She brainboosts TW, then compels him. Her boost works until the end of the action (hers) which is the compel. She gives TW his free action then completes her own (assignning damage to compelled character)

+2 goes away

This assumes they are not going to go counterintuitive (aka Falcon)

Alternately, it says it lasts for one action. It just doesnt say who's

So she compels TW and it lasts for his free action.