If my partner sorted my cards for me, what would the official ruling be?
If I was directing I would rule under Law 12-A-2 (Normal Play of the Board Impossible): Average-plus to your opponents, average-minus to you and you partner. 

I would further rule under Law 90-B-5 (Improperly Touching Another Player's Cards) a further 10% penalty to both pairs. It is your Partner's duty to obey the Rules of the game, which she flagrantly violated. Likewise, your opponents being at the table, they should have prevented the irregularity from occurring, or called the Director themselves. 

This would net your opponents a flat average (average-plus at 60% - 10% = 50%).

This would net you and your partner a 30% (average minus at 40% - 10% = 30%).

Update:
I would not have allowed play of this board to occur (at this table); this is necessary to reinforce the first ruling above in everyone's minds.

If the opponent's were very new to the game I might forgo the second penalty against them; you and your partner always gets both barrels of the penalty however.