Is it incest if two people get married and their siblings get married too? Technically their step siblings.

I'm only asking cuz that's gonna happen in one of my books and if it's incest I have to change a character's role in the story.

Fatgum is best boi. I have four husbands. Fatty boo, NATSUO THE BABY, Dabi, AND TAM TAM. Well, we all love tam tam so it's be rude for me to have him.