Ally or Enemy

[sirpercival]

Fiend of Possession's 5th-level ability:

Ally or Enemy (Su): At 5th level, a fiend of possession gains the ability to reward or punish a creature it is possessing.  If the possessed creature is aware of the fiend's presence and willing to host the fiend, the fiend can bestow a +4 profane bonus on any of the creature's ability scores.  This bonus lasts as long as the fiend wants it to.  The fiend can retract it as a free action at any time, particularly if the possessed creature starts acting contrary to the fiend's wishes.

Similarly, a fiend of possession can bestow a -4 profane penalty on any of the possessed creature's ability scores, usually when attempts to control the creature have failed or the creature contradicts the fiend's wishes.  As with the bonus, the fiend can remove this penalty as a free action, at any time.

Bestowing either a bonus or a penalty is a free action for the possessing fiend.

Questions:
1) Is the FoP limited to 1 bonus/penalty at a time, or can they hand out as many as they want (i.e., boosting all 6 stats)?
2) Do the bonuses/penalties go away when the FoP is no longer possessing the creature, or could an FoP hop between willing members of a party and give them all boosts at once?

[Bauglir]

1) RAI, almost certainly only 1 allowed. However, there's nothing that states you can't use the ability multiple times, so go nuts. It's not like the class was well-balanced to begin with.

2) The ability specifies a creature you're possessing, which suggests that you must be possessing them for them to benefit. On the other hand, the bit about "as long as the fiend wants it to" might counteract that. Not completely sure.