And Wolverine was fairly good until we found out that his wife was actually alive (she could've been an illusion created by Jason... C'mon)
Well, Silver Fox faking her own death was in the comics I think, so I guess they took it from that.
Well. Actually.
In the old Wolverine ongoing comic from the 80s he reveals that one of his earliest memories is finding his girlfriend (Silver Fox) dead. She had been raped and brutally murdered by some guy named Creed. Wolverine doesn't remember who he is or why he did it, but that it was on his birthday and they fought and Wolverine lost and barely escaped. Every year since then Creed (aka Sabertooth) has tried to kill him on his birthday. He even killed others who were going after Wolverine and left a note on their corpses saying "no one kills you except me" (which is where that line from the movie comes from).
Years and years and years later when Wolverine is with Team X there is a woman on the team that he recognizes as Silver Fox and she claims to be the same woman and Sabertooth is on the team too. The thing is, they had been messing with Wolverine's mind so he isn't sure if the memories are real or if he's being manipulated. So Silver Fox may not have even ever existed, or maybe Wolverine's memories were altered to make him think this woman was Silver Fox.
The problem with the movie of Wolverine, wasn't that they didn't stick to the comics (okay, they ignored Dead Pool's comics stuff), but that they did a lot of research, found that Wolverine's story was pretty contradictory in parts (which is the point, until recently one of the main points of Wolverine was that he didn't remember the truth about his past) and they took some key elements and pieced them together into a brainless action flick.
Which makes me think that Wolverine would have been an amazing movie to tell in a similar format of Chris Nolan's 'Memento'