Here is a direct quote from Drew after Lucia tells her about Hunter using the tranq dart:
"Drugging and deception is one thing... But I can't believe he would resort to darting MC like an animal! Those tranquilizer darts are really dangerous... even the police don't use them..."
Right before this she says Hunter takes "certain liberties".
Once more, no redemption possible here!
Right, well she found out about Hunter's drugging AFTER she arrived. I remember her getting upset at him about it.
I don't really have a timeline for how long Drew has been there (a couple weeks maybe?), but we do know that Ophelia's lactation stopped after Drew arrived, right? Perhaps Hunter cut back/stopped on some of the drugs after Drew got there? Or perhaps Drew sabotaged some of them?
Either way, you do bring up a valid point. Drew knew about the drugging and did nothing (that we know of) until she found out about the tranqs. Was she biding her time or was she okay with it? Did she feel powerless to stop Hunter? Is his indoctrination that deep? I'm sure Hunter has dirt on Drew. Perhaps that's why she didn't act?
I'm not sure where WWG will go with Drew's story in the next chapter. However, the fact that there will still be (at least one) NTR ending involving Drew as the "antagonist" has me a little worried. A leopard never changes its spots, perhaps?