I will check the issue later
Meanwhile can you please upload your savegame to e. g. www.mediafire.com (zip the savegame first to reduce size).
So you want to talk to Ms. Moore and she doesn't have an option?
Sorry but now I'm not really sure what's going on. I went to a previous save and re-did everything so I could speak to her before completing 'Oh My Papa'. Now, the 'Oh My Papa' quest appears to have been completed (although the final part isn't actually ticked/checked (UK/US English)) and I need to convince The Khans to join NCR or else eliminate them. They're already intending to suicide attack The Legion so I don't really get why I need them to cooperate with NCR. I didn't want it to go down like this but I figured I had to kill Papa Khan. When I do this however, Regis doesn't give me any dialogue options. The save file here has Papa Khan dead in his room.
MediaFire is down but FileDropper is almost as good (annoying Captcha but that's all).
http://www.filedropper.com/save237seangreatkhanlonghouse643710