You can just have her (probably still mistaken for a 'him') chained up with all the others and overlooked except for a few cruel cuffs on the back of the head.  These people would not be looking for jobs done on board the ship, nor would they trust slaves to do it.  If it helps to picture this particular breed of men, think of them on the most extreme end of the Chaotic Evil spectrum; you'd be forgiven for thinking these were demons in human form.