When your god sibling gets married their spouse then becomes your God sibling in law.
Usually when your sibling gets married their spouse becomes your brother/sister in law, in this case we want all to be welcomed to the family by including our god siblings spouse. Therefore you can refer to them as your God sibling,or God brother/sister in law.
Today, I went to the mall with my god sister in law.
12 step recovery jargon referring to someone new who talks about how great life is, now that they'resober. Usually meaning that the person is out of touch with reality.
The new guy seems pretty happy for a dude who has no job, no money and no family. He must be on a pink cloud.