Can you help me think of an alternative to "in-laws" to refer to my wife's parents?

I am not legally married, so technically my wife’s (The reason she is my wife is because we had a ceremony.) parents are not my in-laws. I sometimes do air quotes when I say in-laws, but that is so 90s. Is there some other term I could use? Maybe something from another culture. Or, can you think of one yourself?