I feel like all those creepy hallucinations that Jesse had about his mother throughout the...

i've also wondered that too. There's also a scene where Law is talking about "his" hemophilia, and says his father must have had it, because only his clothes were soaked in blood, but the illustration showed the mother's gown all bloody. Now we know Jesse has hemophilia, so I figured it was something like your theory and not a translation error.