Okay, here's something I'm trying to figure out and I'll bet someone reading this can help me…
John is Jerry's uncle. Marsha is Tom's sister. John marries Marsha. What relationship then is Tom to Jerry? He's not his uncle. Is there such a thing as an uncle-in-law? Or does this make him some kind of cousin? Is there any tidy term to describe this relationship? I'm an unmarried only-child so this stuff is alien to me.
Some of you will probably recognize the real-life people I'm writing about but that's not important. I've asked about a dozen people and gotten several different answers, many of them accompanied by "Well, I'm not sure but…" So please only write and tell me if you're reasonably certain. And thank you in advance.