Whatever happened to Iroh’s wife?

I mean, I assume that he had one at some point. Lu ten had to have had a mother, and as Iroh was next in line for the position of Fire Lord, I assume he, like Ozai, had a traditional arranged marriage.

So what happened to this hypothetical wife? Did she leave him after their son’s death or vice versa? (I honestly cannot imagine Iroh abandoning his wife, even in grief) Did Fire Lord Ozai have her banished/killed as a threat to his power.?There’s no canon reference that I could find that mentioned Iroh ever being married, so obviously wasn’t important to the overall story of ATLA. What do you think?