DOM - What are you doing? You are the king of this stuff. Telling her that she does not apply her mind? You would kill me for that one!
Come on dude... you know this stuff better than anyone.
She does the online stuff because it's an escape from reality and does not require real intimacy. That may be the root of the issue. Unfortunately, some women have a propensity for divorce. They most likely did not have a great relationship with their mom & dad and do not know how to get close to a spouse.