Learn English – correct phrase for the relationship with the son’s father/mother in law

kinship-terms

What is the correct phrase for the relationship between me and my son's father/mother in law?

Best Answer

It's in your question.

There is no special term in English for a person's child's parents-in-law.

They are your son's parents-in-law.

Now, this is not to say that English wouldn't be enriched to have such a term, but it doesn't and there we are. It also doesn't have terms to distinguish between the flavors of aunts and uncles, and a few others that do exist in other languages.