Taken back for perhaps a second by the sheer intensity of his actions, Uhura quickly allowed herself to relax into his embrace, responding in kind. She was more than willing to allow him full reign over this situation, to go with whatever happened, because she knew in her heart that he would not consciously do anything that she would object to. And anything that she might...
Well, he wasn't exactly in control of himself, running on pure instinct. She would hardly blame him. Love could forgive everything if it had the right incentive. And having him alive was definitely incentive enough.
It only a beat for her thoughts to be silenced, her mind shifting into a neutral and allowing herself to work on gut instinct and natural reactions. It was the best way to go about this. She could analyze it to death later.