have u tried the cheating route
(1) on thursday find isabelle on the beach (she is the tanned one with the yellow swimsuit)
(2) visit Josef in his office he will be talking with her .
(3) find her in the mall.
(4) on thursday u can go to the hotel visit her .
(5) tell josef you f-ed her and where he can find her.
(6)next thursday u see her you have a threesome after at the entrance tell him to tell anna (might be forgetting dialogue) then at home she gets mad kicks him out then same as the beer method. i think that's all let me know if i've missed something