Kithri still stabs him, for good measure. Better to have a dead-dead orc than just a dead orc. 

The halfling let out a breath she hadn't realized she'd been holding, bringing up the back of her left hand to brush a bit of hair from her face. She sheathed her dagger and looked over the bodies. "Well, that could have gone better but either way, we won!"

She beamed a smile to the others, standing on the back of the orc which had been felled by Athar's arrow.