Since he already had her in his arms, Wolfe decided to get to work and clean out the corruption in her system to go with all of the mutations and other damage that Mary and whoever had visited her village last time had repaired for her. Why leave the very last step undone, right?
This scout seemed to be even younger than Katerina was, and the black corruption wasn't nearly as thick as the sludge that had been pushed out of her had been. It was closer to syrup, and the process of cleaning it out was only going to take him a few seconds.
The thick layers of clothing that she wore to make herself look like she was just short and stout quickly absorbed the sludge, so she would have to wash everything later, but the witches could help with that.