And now something unrelated to the party. Please Please, stop having back to back to back skill checks during conversations. I had to do 3 intimidation checks in one conversation to get the result I wanted. This is not fun. It is fun the first time, but after having the thrill of succeeding it and being confronted by another skill check and then another was not so fun. If my DM would be doing this in my home game, I would call him out on it and explain to me why he thinks this is necessary.
Oh my god, yes!! It just felt deflating talking to Nettie to get the Antidote requiring check after check after check. I get it, if the check is supposed to be convincing someone of something they really don't want to do then set a difficult Required Roll. Don't have the NPC say "Good point, but I'm still not doing that".
If this was happening in a game I was playing with a DM I too would be asking if it was really necessary for multiple of the same bloody check. It's railroading is what it is, they offer the choice but don't really want to come up with any other result than the story intended one.