(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