Game is working flawless for me. No bugs no errors and no problems at all. [Playing on PC]
Fast travel to tavern then go to right side of the map. You will see a lesbo hunter chick. Speak with her with every options she has then try to speak with Nessi again about ripping K's clothes.
Are you playing the latest version of the game which is 0.7? If yes, then your save must be corrupted somehow. I don't know why. I saw someone other than you was complaining about this problem for version 0.6d. When i try his save, i had the same problem but i've never faced this bug when i start a new game at my own PC. I don't know the tech. details of it but something might be related with one of the windows updates. (Just a assumption of mine, could be completely wrong)