On the one hand, there's a great deal of arrogance in what Benevenuta is setting out to do and what it assumes about her capabilities - that she can walk onto a pirate ship apparently unarmed, hands bound, and expect without even entertaining the possibility of failure to walk off it under her own power with a few lessons learned and some other things that don't belong to her - but on the other hand, she's trained for this and she is very good at what she does.

“Cooperation,” she repeats, dubiously, shooting a wary look at Beatriz as the gun lowers and taking care not to struggle against the bindings; no one likes rope burn, that isn't terribly suspicious, and best they not wonder too deeply later why she doesn't have any. “What cooperation?”

'Not trying to escape', probably. It's going to be a delicately timed thing, staying long enough to make the experience useful without giving them the opportunity to actually get her ransomed back to Eddington. (She'll miss him, she thinks, but after all this is done with, she doesn't expect she'll be able to go back.)