Yes, the facts are clearly divergent. I guess , though, speaking purely psychologically - it could be said that Homolka from the beginning accepted every bizarre fact about Bernardo, no matter how disturbing or criminal those facts were-- and that nothing in her life prior indicated she was capable of responding this way.
To me, that seems to be a case of Bernardo-- already a rapist many times over-- slowly grooming Homolka to do his bidding.
Again, nothing remotely like this case, even if you take what the prosecution alleges as fact.