I have been to the silver rush and I got a different dialog from her there. I know I have other options for the quest, but my main concern is actually that I can no longer get into the terminal to buy ammo or supplies from contreras. I hope it resolves when I ditch her after this quest.
I had this kind of problem with Forlorn hope for a while. I actually called up the tech helpline.. Heh, they tried telling me they'd never heard about these faults with nv.. They changed their mind once I told them I had the internet and read forums etc..
Anyways... The advice I was given was to travel to a completely different area and do some unrelated quests, apparently it changes the way the game responds or something, not sure. It kind of worked though. FH was still pretty laggy but it eased up by quite a bit and I was able to complete those quests.