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.

Me and my god brother in law went to see a movie.

My god sibling in law took care of my pet while I was on vacation.
by IM_SYLVIE_NOW September 8, 2022
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1. The spouse of one's sibling.
2. The sibling of one's spouse.
My sibling-in-law is a good person.
by Elivaldeq November 24, 2019
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