Relationship between my paternal aunt and maternal uncle

I have an aunt by marriage on my dad's side who is his sister-in-law and an uncle by blood on my mom's side who is her brother. Would my aunt and uncle be considered sister-in-law and brother-in-law to each other?

Solution 1:

I have a case like that in my family and what they are called is "husband and wife".

Yes, their spouses died at some point and they ended up marrying each other.

I've also got ancestors where it turned out that 3 bothers from one family married 3 sisters from another family. I guess when you have to travel by horse or mule for 20 miles to find someone who does not have any blood relation to you, if you find 3 of them, you figure you've hit the jackpot.