Relocate and wait

[OverHere]

I've read some points of view about marriage and divorce when the spouse is abusive/uPD.  I haven't read all the posts.
But has anyone reflected on the position a spouse can be put in where they are supporting lies or creating a false appearance? 

I ask this because once a spouse has fully taken on board that they have Cassandra Syndrome, in other words that no-one will believe them, ever, it starts to raise questions of complicity IMO. It can take decades to really get the message, but eventually any spouse will be forced to give up and go silent about the true nature of the abusive partner, effectively taking part in a charade.  What effect is this going to have on the people in the outer circles?  On other believers, if applicable? "Living a lie" is what I mean.

I currently believe in separating and staying married until it's obvious that the abusive spouse has found someone new or had a complete change of personality, but I'm not fully persuaded. I don't see relocation as "leaving".