et bien moi aussi j´ai un bug, je rentre, je tue les 3 femmes, etla première réssuscite!, je ne peux pas sortir et si je lui parle, je refais le combat avec les trois et ainsi de suite...

bin moi c´est pire je rentre dans la ferme apres 23h le prob c´est qu´il y a personne et que je ne peu plus resortir je suis sur ps3 y´a t´il quelqu´un qui sait ce qui se passe

J´ai trouvé ca :

"There is a glitch that can occur, the sirens will start attacking you before you can communicate with them, you must then either kill them, or run outside and let the guards take care of them. Both result in you ending the quest early, and not gaining a reward or fame points.

* Going to jail will usually make Signy reappear outside the jail when you are released. You can then continue the quest like normal, except they will not show up in the farmhouse, they will wait for you in the Flowing Bowl. After you killed them then you can go to the farmhouse and wait until 11 pm and go in there you will meet the 3rd member of the gang and she will attack you on sight. After you killed her the guards will show up and take care of the rest for you."

Ici :
http://www.uesp.net/wiki/Oblivion:The_Siren%27s_Deception