She definitely wasn't a sous chef. Sous chefs have skills. As @Back Atcha mentioned, she specifically said she was an assistant when she came on board and talked to Yawn. Considering that the two boats were in the same bubble, and that it sounds like that may be the boat with the crew, there was definitely some producer fun going on there. That or the other boat was all - send her - so that they didn't have to deal with her for a bit. She was completely clueless to not even get steak right. I also find it funny that Yawn thought another boat would give up their sous chef for a night!!!