Venus can't believe that there will be a day when she'd get caught up between two fellow villains who'd patronize her like this.
This kind of situation irks her to a certain extent, but even though she wants to take action on her own accord - not only to for her own satisfaction but for the safety of her vessel as well, she knows that she's not the one who's supposed to lead the strides from here on out.
When Wes said that he has a plan and told Eli her role in it, Venus could tell that he has more in store. After all, he is more than aware of the plot holes of his schemes, and he sounds like he has already calculated some back-up plans in case they flipped both of them over.
That's why this time, she feels like she will have to go back to playing the role of a hostage again.
"Perfect timing, Number Two. I knew I could count on you," Lord Caspar commended, beaming like a proud father who had raised his child well.