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.

God sibling in law by IM_SYLVIE_NOW September 7, 2022

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step-co-sibling-in-law

Spouse's stepsibling's spouse.

My step-co-sibling-in-law is a good person.

step-co-sibling-in-law by Wonbig October 13, 2021

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half-sibling-in-law

Spouse's half-sibling or half-sibling's spouse.

My half-sibling-in-law is a good person.

half-sibling-in-law by Rwopazaq November 24, 2019

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double-sibling-in-law

Sibling’s spouse and spouse’s sibling at the same time.

My double-sibling-in-law is a good person.

double-sibling-in-law by Rwopazaq November 24, 2019

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