A marriage is not just the union of two people. It is also the union of their data. If they divorce, there can be situations where the lawyers may be provided with a lot of information about the other party due to available "data" being released by one of them.
This is a link to an interesting USA article about this very point.
The electorate is now witnessing a vivid example of this, arising from the separation of Anthony D. Weiner, a former congressman, and Huma Abedin, a top aide to Hillary Clinton. The F.B.I. is poring over their emails with a presidential election just days away.