(It's a real tree, just a small one, with a trunk diameter of 2 or 3 feet.)
Now at 6 hit points, Quillathe realizes she has to get that (munchkin) vicious weapon out of the half-Orc's hand. With spring attack, she moves back 5 ft. out of his threatened area and attempts to disarm him with her 15-ft. reach whip. Using no combat expertise or defensive fighting, her disarm bonus is +22 (whips get a +2 to disarm attempts). Argh's disarm bonus is +29 (you lose the +2 bane bonus, and the +2 bonus on disarms only apply when you're initiating the disarm). After her disarm, whether it goes well or poorly, she'll continue her spring attack movement another 35 ft., ending in another tree square, where her AC will be 27, and if necessary will draw a back-up bladed whip as she retreats.
As she moves, she's always heading toward the far corner where the large tree is.
Here's how the rolls will be. The first die roll is her first opposed attack roll, with a +22 bonus. The second die roll is her opposed attack roll to avoid being disarmed if the first attempt fails. Of course, if the first attempt goes well that die roll is unnecessary.
[dice]
So her attempt to disarm is a 39. If that fails, her attempt to resist is 35.