Justice card to me would be more of an orderly home than a happy home. Everything runs the way it should because thats what is expected but that doesn't mean sunshine and rainbows behind closed doors. A lot of times it's doing things out of obligation or because it seems like the right thing to do.As far as the Devil card coming up for someone leaving their partner, in my experience, no. The Devil usually indicates staying put, regardless of how bad the situation might make you feel. Its an extremely frustrating card because often times the person could easily remove themselves from a situation that is bad for them, but they refuse to do so. The hell you know vs the heaven you don't, if you will.
Surrounding cards are always important though as they can point the entire reading in a different direction.
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"The world is so full of a number of things, I 'm sure we should all be as happy as kings." -RLS